Jordan Journal of
Physics, Vol. 18, No 4, pp. 529-549 (2025). https://jjp.yu.edu.jo/index.php/jjp/article/view/323. https://doi.org/10.47011/18.4.10
On the origin of cosmic microwave background
radiation
Sergey G.
Fedosin
PO box 614088, Sviazeva str. 22-79, Perm, Perm Krai, Russia
ORCID
0000-0003-3627-2369, E-mail: sergey.fedosin@gmail.com
The
alternative mechanism of the emergence of cosmic microwave background radiation
(CMB), associated with the thermal radiation of primordial gas-dust clouds in
the early Universe, is considered. The emergence of such clouds in the theory
of infinite hierarchical nesting of matter is a natural stage in matter
evolution. The mass, radius, and spatial concentration of typical primordial
gas-dust clouds, the distance between neighboring clouds, and the power of CMB
energy generation per unit volume and per nucleon of the early Universe were
calculated. The masses and radii of these clouds correspond to the masses and
radii of the observed Bok globules. The presented mechanism is consistent with
the cluster model describing the appearance of angular multipoles in the CMB
power spectrum. In addition to CMB radiation, cosmic infrared background (CIB)
radiation and cosmic optical background (COB) radiation are also considered.
According to the presented model, the sources of CIB are primordial
protoplanetary clouds. As for the COB radiation, it is associated with the
radiation of the first protostars. During evolution, each primordial cloud,
with a mass of about 31 solar masses, first generates CMB radiation, and then
CIB and COB radiations. Since protostars give rise to neutron stars, the
concentration of primordial gas-dust clouds is also the concentration of
observed neutron stars. In the course of the calculations, a new definition of
the radiation intensity is used, which is based on the vector of the surface energy
flux density and accounts for the angles of incidence of radiation on a flat
receiver from all sides of the hemisphere. According to Poynting's theorem, the
relationship between the intensity and energy density of black body radiation
is derived from the concept of photons.
Keywords: cosmic microwave background; infinite
hierarchical nesting of matter; early Universe; cosmology:
theory; matter evolution.
PACS: 98.70.Vc
1. Introduction
The cosmic microwave background radiation (CMB) in the wavelength range
of 0.3-30 mm contributes most to the total energy of cosmic background
radiation. The standard explanation for the origin of CMB based on the Big Bang
concept, in which CMB appeared in the early Universe. However, the idea of the Big Bang
still has drawbacks [1]; therefore, other alternative cosmological theories
continue to appear. For example, in the quasi-steady-state cosmological model,
it is assumed that CMB could be the result of processing stellar radiation by
cosmic dust [2].
However, even in this case, there are difficulties associated with the
fact that the CMB is too homogeneous and isotropic and has a spectrum of ideal
black body. According to the dynamic Universe model [3] and the hierarchical
Universe model [4], the stellar radiation in the early Universe could be
sufficient for CMB to have the observed energy density and be isotropic, so
that the Big Bang is not needed. According to [5], the models based on a Universe in
dynamical equilibrium without expansion predicted the 2.7 K temperature prior
to and better than models based on the Big Bang. In
addition, it was shown in [6] that isotopes of all the observed chemical
elements can be formed from hydrogen in stars during the time of the order of
100 billion years, which makes it possible to do without the Big Bang.
It is known from measurements [7] that the CMB temperature corresponds
to the blackbody temperature
К. If the CMB is in equilibrium with respect to some global blackbody of
the Universe, it would have a volumetric energy density equal to
J/m3, where
is the Stefan–Boltzmann constant,
and
is the speed of light. This relation
characterizes, for example, the state of a hollow black body, which is in
thermal equilibrium with radiation in the inner cavity. The surface of such a
cavity emits and absorbs radiation energy with an intensity of
W/m2. This
means that ideal receivers, close in their properties to a blackbody, will measure in the cavity
the CMB intensity on the order of
. In this case, the contribution to the intensity
will be made by photons incident on
the receiver at various angles.
In measurements, the angular intensity
is often used,
where
denotes the solid angle in
steradians, from which the radiation arrives at the receiver. In accordance with the
Stefan–Boltzmann law, for CMB radiation, if it were in thermal equilibrium with
matter as in a hollow black body, the following relation would be true:
W/(sr·m2). This
value is in accordance with the results in [8].
When plotting the radiation spectrum of a blackbody, the dependence of
the spectral angular intensity
on the radiation frequency
is usually plotted. This value reaches a
maximum when a small frequency range
is selected near the frequency
GHz, corresponding to the maximum in CMB
radiation. In accordance with Wien’s law of displacement for the frequency
there is
, where the
constant
,
is the Planck constant,
is the Boltzmann constant, and the radiation
temperature
is measured in Kelvin.
The purpose of this work is to explain the origin of background
radiation in the model of a hierarchical Universe. Based on the thermal
equilibrium of radiation and matter of radiation sources in the early Universe,
we will find the sizes of these sources, their masses and concentration in
space. As will be shown below, in the presented approach the formula
for the energy density of background microwave
radiation in the Universe can no longer be valid, as well as for background
infrared radiation and background optical radiation.
2. Definition of intensity
The standard definition considers intensity as the amount of energy
passing per unit of time through a unit area oriented
perpendicular to the direction of energy propagation. To take into account various orientation
angles of the receiver with respect to the incident radiation, a different
definition should be applied. In
the concept of photons, we can assume that intensity is the magnitude of a certain vector, namely the vector of
the surface density of the radiation energy flux.
Let us assume that the radiation receiver responds only to the radiation
component, which is perpendicular to the receiver plane. This can happen, for
example, when the receiver is sensitive to the momenta of the photons falling
on the receiver from all sides. Then the momenta components of the set of
photons, which are parallel to the receiver plane, mutually cancel each other,
and the sum of the perpendicular momenta components of the photons is
considered. In this case, we can assume that the energy flux surface density
vector
is determined by the amount of incident
radiation energy on the flat radiation receiver from all sides of the
hemisphere per second per unit area
of the receiver, taking into account the
angular dependence:
where
denotes the energy of the photon with momentum
amplitude
; the index
specifies the photon number during summation
in (1);
is a unit vector directed along the photon
momentum
, such that
;
is a unit normal vector directed to the
receiver plane from the hemisphere;
defines the force acting from the photon on
the receiver;
is the force
projection on the normal;
denotes the pressure from the photon’s side,
perpendicular to the receiver surface; and
is the total perpendicular pressure from all
photons.
If we take into account that the electromagnetic radiation pressure is
,
then according to (1), we have
,
. (2)
In (2), the vector
is directed in the same way as the unit normal
vector
and is proportional to the speed of light and
the electromagnetic pressure on the receiver.
The difference between
and
in (2) can be attributed to the well-known 4/3
problem, according to which the mass-energy
of the electromagnetic field of a charged body
moving at a very low velocity, derived from the Poynting vector and
proportional to the field momentum density, is 4/3 times greater than the
mass-energy
, corresponding
to the field energy density. The relation
corresponds to the equality
, so that
the radiation pressure
is related to the Poynting vector, and the
pressure
exerted on the receiver is related to the
field energy density. According to [9], the 4/3 problem occurs because the
electromagnetic field energy density and the field momentum density are not the
four-momentum components but rather the field stress-energy tensor components.
To check formula (1), first place the receiver on the surface of the
sphere of radius
, at the center of which there is a certain source
with the power of isotropic radiation
. In this situation, the radiation falls on the
receiver at a right angle. In (1) the scalar product
is obtained,
and the energy flux density recorded in the receiver is then equal to:
.
(3)
Let us consider another situation, when one of the many existing
radiation sources is the volume element
. We
can assume that
is the differential of the radiation energy,
leaving the volume element
per unit time
. Let us
choose the hemisphere radius
, where
is the speed of light, and place the receiver
at the coordinate origin on the plane
at the center of the hemisphere. This
situation is shown in Figure 1.
![]()


Now, all the radiation energy contained in the hemisphere with a radius
falls into the receiver at time
. Then, in spherical coordinates for the intensity
differential of the volume element
located inside
the hemisphere at a distance
from the
center, in accordance with (1) and (3), we have:
, (4)
where
is the volume
element considered as a source of isotropic radiation; the product
defines the
angular dependence of the radiation intensity so that at
photons move
along the
axis and do not
enter the receiver at all; and at
, photons move in the
plane and do not enter the
receiver either. If
, and
, photons fall on the receiver at a right angle to its
surface and make the maximum contribution to the intensity. The appearance of
in (4) follows from the fact that, according
to Figure 1,
,
, and in
definition (1), we have
.
Integration over the hemisphere’s volume replaces the summation in (1) and gives the following:
. (5)
The calculation in (5) shows how, in the case of equilibrium blackbody radiation,
we can understand the relation between the intensity
and the energy
density
of radiation
that enters the receiver from different directions. Hence, we can see that
is actually related to the mass-energy of the
field energy density, and not to the mass-energy of the momentum density, which
is found using the Poynting vector.
3. CMB energy production
It is known that CMB radiation originates from large distances;
therefore, in one way or another, it is generated by many sources. Let us
assume that, on average, each cubic meter of the early Universe was a source of
CMB and produced
joules of CMB
energy per second; then, the volumetric power
of energy
generation is measured in W/m3. Next, we proceed as in [4].
Let us suppose that radiation sources uniformly fill the hemisphere,
while radiation from some sources does not fall on the receiver at a right
angle. This means that to determine the intensity
, we should integrate the entire hemisphere’s volume
and take into account the angles of incidence of radiation on the receiver,
similar to (4) and the definition of intensity in (1). We will place the receiver at
the origin of the coordinate system and position it in the ZOX
plane to measure the CMB energy.
If some radiating volume is located at a distance
from the origin of coordinates, then
the effective amount of energy
, incident per unit time on the unit area of the
receiver, will be equal to:
, (6)
where
is the Hubble constant.
The first exponent
in (6) describes
the exponential decrease in the energy of CMB photons as they travel a distance
.
As a result, the wavelength of the photons is shifted, which is known as
the cosmological redshift of the spectra of distant radiation sources.
The second exponent
sets the degree of scattering of
photons on their way to the receiver, reducing the number of arriving photons.
This exponent corresponds to the Beer–Lambert law for light scattering, and
is the scattering cross section,
is the concentration of objects
scattering light.
Let us take the integral in (6) over the volume of the
hemisphere of infinite radius:
In (7), the relation between the measured intensity
and the volumetric power
of CMB energy generation in
cosmic space is presented.
Considering that the exponent
in (7)
describes the exponential decrease in energy, as well as in the frequency of
CMB photons as they travel a distance
, the following is obtained for the photon wavelength
and redshift:
,
,
.
(8)
If in (8)
is small compared to unity, then
, which leads to the Hubble law in the form
.
Due to the decrease in energy and scattering of
photons in (6), some blurring of images of distant galaxies should be observed,
since photons change their motion direction as a result of scattering. In fact,
the observed blurring is insignificant, which can be explained by the small
size of the electrogravitational vacuum particles described in [4] and [10],
which are unable to significantly change the direction of the photons’ momenta.
We can also refer to more recent works [11-12], in which, in light of new data,
the observed dependence of the duration of supernova explosions on the distance
to them, the dependence of the surface brightness of galaxies on the redshift,
the relationship between redshift, relict radiation, and the blackbody spectrum
were analyzed.
In addition, observations of the angular radii and
surface brightness of galaxies at a given luminosity do not correspond to the
expanding Universe hypothesis in the
model, but are in good agreement
with relation (8), which describes the relationship between distance and
redshift, as well as with the static Universe model [13-14], in which the
surface brightness does not depend on the redshift
. With relation (8), the supernovae type Ia data give almost the same result as the
model.
In the theory of infinite hierarchical nesting of matter [4], [10], [15], it is assumed that the substance
of a certain level of matter arises in the course of evolution of the substance
of lower levels of matter. Therefore, stars as objects of the stellar level of
matter appear after the compression of large gas clouds. The main objects of
these clouds are nucleons belonging to the nucleon level of matter. In turn,
the appearance of gas clouds is a consequence of evolution of the substance of
the praon level of matter, and praons can form the substance of nucleons in the
same way as nucleons can form the substance of stars.
Based on this, suppose that in the early Universe, the entire volume was
more or less uniformly filled with CMB sources at concentration
, the average radius of these sources was equal to
, and the effective temperature of particles on the
surface of these sources was equal to the temperature
. In this case, we can write:
In (9), the CMB generation power per unit volume
is expressed through the surface area of a
typical CMB source, equal to
, through
the intensity
of radiation from this surface, and through
the concentration
of CMB sources in Universe.
Substituting
from (7) in (9) and taking into
account that
, we find:
.
(10)
We assume that during the time needed for CMB photons to reach the Earth
from distant regions of the Universe, the number of baryons and their
concentration in cosmic space did not change significantly. Then, in the first
approximation, we can use the conclusions of the
model (Lambda-cold dark matter
model), where the critical mass density reaches the value
kg/m3, if we assume that the
Hubble constant
equals 70
km/(s·Mpc) or
s-1 [16].
The physical density of the visible baryonic matter in this case is
kg/m3. This
value is chosen in such a way that, among other things, it best fits
observations of the amount of visible matter in galaxies. This approach will be
sufficient for us since we will further derive various relationships, the
physical meaning of which does not depend on the specific value of
.
Let us now take into account that the CMB sources, that is, the
primordial gas-dust clouds, were located discretely in space with a
concentration
,
where
is the mass of a typical CMB source. Each
source has a cross section equal to
. At very
large distances, all sources begin to overlap each other, which makes it
difficult to see the most distant CMB sources and weakens the intensity of the
radiation that could be at the radiation receiver. This leads to the appearance
of the exponent
in (6).
The mass of a typical source is expressed by the formula
,
where
is the mass density of the source substance. Expressing
from here and
substituting into (10), taking
into account the equality
, we have:
The last formula in (11) relates the radius
,
mass density
of CMB sources and the effective temperature
of the surface particles of these sources.
5. The origin of energy in
CMB sources
For the particles of numerous CMB sources to have a kinetic temperature
on the order of
and to be able
to subsequently radiate at this temperature, it is necessary that the particles
of these sources somehow acquire the corresponding thermal energy as the energy
of proper motion.
Let us turn to the theory of infinite hierarchical nesting of matter,
according to which different matter levels are found in the Universe, and the
main objects of these levels have significantly different masses and sizes. In
particular, there are metagalactic, stellar, nucleon, praon, and graon levels
of matter [4],
[10], [15], [17-21].
All matter levels structured by gravitational clustering. This
process is accompanied by the opposite process of fragmentation when particles
collide with each other and with radiation quanta. In large gas clouds, under
appropriate conditions, atoms and molecules can combine under the action of
gravitational forces first into molecular complexes and then into more massive
dust particles, until planets, stars and their clusters are formed. Dust
particles of micron size have a fairly dense core surrounded by a layer of
loose matter. The minimum time required for the formation of such particles can be
estimated by the approximate formula for the radial fall of matter to the
accretion center under the action of gravitation [22]:
where
is the gravitational constant, and
is the mass density of matter at the
initial moment of fall.
For example, with a density of
kg/m3 in (12) we obtain a
duration of approximately 2.3 hours. The lower the initial mass density of an
object is, the longer it takes for such an object to be formed. For a gas cloud
with an initial density of
kg/m3, the time
will be
approximately
years. If we substitute in (12) the
current density of baryonic matter
kg/m3, the corresponding duration of metagalaxy formation will be on the order of 180
billion years.
A more accurate calculation accepted in astrophysics takes into account
the time required for a gas cloud to increase its density with decreasing
radius instead of taking into account the time of fall into the accretion
center. Let us assume that the evolution of matter in the hierarchically
structured Universe leads over time to the formation of baryonic matter with
average mass density
. This process cannot be uniform everywhere, and in
those places, where it goes faster, the matter can compress under the action of
gravitation, regardless of the surrounding volumes of space with lower density.
For acceleration the particles’ motion in the gravitational field outside the gas cloud with the mass
, we have:
.
(13)
This
equation (13) is also suitable for describing the motion of the gas cloud’s
outer shell. The solution of (13) should be sought in the form
,
.
Hence, it
follows that
, and if
, where
is the initial radius of the cloud,
we obtain the relation for the velocity of the shell motion, which is
associated with the law of conservation of energy:
.
(14)
For the
case of cloud compression, the coordinate
decreases over time
, and therefore, we use the following
equation:
.
(15)
The solution
of the differential equation (15), in the case of compression from radius
to radius
, is as follows:
.
(16)
The
maximum time is reached when the matter falls onto the point center with the
radius
. Assuming that
, in the case in (16),
. This time depends only on the initial mass density
of the cloud and is estimated,
since the solution does not consider the pressure forces in the gas cloud,
which rapidly increase as the radius decreases.
Considering
this approach, two scenarios are possible. In the first of them, the matter of
the observable Universe with an average density
arises from praons, the smallest particles of
the lowest level of matter, in a period of time determined by the physical
conditions of this process. To understand how a nucleon can be formed from a
set of praons, it is enough to imagine a similar process, in which a set of
nucleons in a large gas cloud is compressed to the maximum extent under the
action of gravitation. If the mass of the emerging star is
large enough, then the result of its evolution would be a supernova and the
birth of a neutron star. Praons, nucleons and neutron stars are similar because
they have the highest possible mass densities and the strongest electromagnetic
fields at their levels of matter. In this case, it is assumed that at the level
of nucleons the particles’ matter is held together not by ordinary gravitation
but by strong gravitation [10], [15].
In the
second case, baryonic matter is first created; this matter is distributed in
space with a certain mass density
and subsequently compressed to
density
. Let
significantly exceed
. By substituting
instead of
and
instead of
, and neglecting the first term in (16), we obtain
. As an estimate, we will substitute here
kg/m3 instead of
and will obtain the corresponding
minimum compression time, if it actually took place:
billion years.
For
comparison, in the standard cosmological
model, based on the general theory of
relativity, the age of the Metagalaxy is estimated to be approximately 13.8
billion years. Moreover, in order to explain the spatial flatness, homogeneity,
isotropy and large-scale structure of Metagalaxy, the model includes the
hypothesis of cosmological inflation at the early stages of the Big Bang. The
exotic character of such inflation is associated with the fact that during a
period of time from 10−42 sec to 10−36 sec after the
start of the Big Bang at the initial Planck matter density of approximately 1096
kg/m3 the radius of the Metagalaxy should have increased by a factor
of 1026 [23]. As can be seen from the estimates made above, if the
hypothesis of cosmological inflation is not used, the minimum age of the
observable Universe should be an order of magnitude greater than in the
model.
We can
consider a typical CMB source as a relativistic uniform system and estimate its
internal thermal energy using the virial theorem [24-25]. Considering the contributions of gravitational energy and pressure
field energy to the system’s potential energy, according to [26], the following
relation is obtained for the kinetic energy
:
.
(17)
However, the energy
can be approximately expressed in terms of the average temperature
of the source:
, (18)
where the ratio of the source mass to the nucleon mass
in the form
specifies the total number of
nucleons
as an estimate of the total
number of atoms, and
is the Boltzmann constant.
Comparing
expressions (17) and (18) for
in view of the relation
gives us the following:
A primordial gas-dust cloud with mass
, which is the source of CMB, can be considered as a
blackbody, in which matter is in thermal equilibrium with CMB radiation. The
radiation energy density inside the cloud should be equal to
. When a typical CMB source is formed in the form of a
gas-dust cloud, the binding energy
should be released,
which is equal in order of magnitude to the total kinetic energy
of the cloud
particles. A more precise estimate in [26] gives
. We can assume that the binding energy
is radiated from the cloud by
means of CMB radiation. In this case, the following equality must be satisfied:
, (20)
where
is the cloud’s volume.
Substituting
from (18) in (20) and considering
the relation
, we find:
.
(21)
6. Parameters of CMB sources
Relations (11), (19) and (21) can be considered as a
system of three equations to determine unknown quantities
,
and
. Substituting
(21) into (19), we get:
.
(22)
Multiplying
(22) by
(21), we find:
.
(23)
Substituting
(23) into (11) leads to a quadratic equation for
:
.
(24)
Solving
equation (24) gives the surface temperature of a typical CMB source:
K. (25)
Substituting
(25) into (22) and into (21), we
obtain the radius
of the CMB source in the form of
a gas-dust cloud and the density
of the substance of the cloud:
m.
kg/m3. (26)
The
radius of the cloud in (26) reaches the value
pc.
Next,
taking into account (26), we find the mass of the source:
kg or
, (27)
where
is the mass of the Sun.
Parameters
(26-27) of a typical CMB source correspond
to a rather large gas-dust cloud, the particles of which acquire their kinetic
energy due to gravitational work to compress matter. When the particles
collide, the energy of motion is converted into heat and can then be radiated
in the form of CMB quanta.
If
we take into account that the obtained in (26-27) parameters of the sources belong to gas clouds in the early Universe,
then we can expect that the first stars appeared precisely in such clouds.
Later, similar clouds could give rise to the first open star clusters, which
became the main elements of emerging galaxies. For comparison, the number of
stars in currently observed open star clusters can be more than one hundred,
the typical masses of clusters can exceed
, the core’s radius can reach approximately
0.6 pc, and the radius of the corona in a typical cluster can reach 6 pc.
The
concentration of CMB sources in the early Universe is found through the density
of baryonic matter
and the
mass
of a typical source according to the first relation in (11):
m–3.
(28)
If
we assume that each source is located in a certain cubic volume in a cubic
lattice, then the shortest distance between the nearest sources will equal
m. This
means that the distance between the centers of the nearest sources is
times
greater than the radius
of a typical source and is equal to the value
on the order of
kpc at
pc
according to (26).
The value of
, that is CMB generation power per unit volume of the Universe, is found
from (9) taking into account
(25),
(26) and
(28), or from (7) taking into
account the relations
,
:
W/m3. (29)
The
values of
may differ slightly in different directions,
reflecting the variability of the Hubble parameter and the spatial matter
distribution.
The
average concentration of nucleons in the Universe is
m–3. Taking this into account, from (29) the power of CMB energy generation per nucleon of the Universe is determined:
Dividing the binding energy
of one SMB source by the number
of nucleons in this source, taking
into account expressions
(18) and
(25), we find the binding energy
per nucleon:
J/ nucleon. (31)
On the
other hand, an estimate of the photon’s concentration in the volume of a CMB source in a state of temperature
equilibrium between radiation and matter at the temperature
K is obtained as
m-3, where
J/(K·m3)
is the
volumetric density of the CMB entropy and the coefficient
Dividing
the photon energy density
(20) by the photon concentration
, we obtain the average energy per photon:
J/photon.
(32)
Note that
the binding energy per nucleon
in (31) and the energy per photon
in (32) are close to each other in magnitude.
After the photons leave the CMB sources, fill outer space and reach the Earth,
their average temperature will decrease from value
K to value
K. In this case, the energy of a photon with a
frequency of
GHz corresponding to the maximum in CMB
radiation at temperature
K is equal to
J.
Hence, the
ratio of the number of CMB photons in cosmic space to the number of matter
nucleons present in this space should be on the order of unity. On average, we
can assume that each nucleon of the observable Universe produces only one CMB
photon.
In the
course of our calculations, we assumed that all the nucleons present in the
Universe with an average density of
kg/m3 were compressed by
gravitation into primordial gas-dust clouds with an average
density of
kg/m3 (26). These
clouds play the role of typical CMB sources. Let the volume of a typical source
be denoted by
and the volume of the same, but not compressed matter in the homogeneous Universe with
density
and with the same mass
(27) be denoted by
. Then, the ratio of the volumes equals
. Now, in view of
(18), the binding energy
of one source, and the
number of nucleons
in the source, we can estimate the average CMB
energy density in the Universe in the following form:
J/m3. (33)
When
deriving relation (20), we use the expression
. Combined with (33) and the relation
, this gives the following:
.
(34)
In (34), a
significant difference is obtained between the averaged CMB energy density
in (33), and between the photon
energy density
in the case of thermal equilibrium
of photons with the matter of CMB sources. The difference in magnitudes of
and
results from the fact that the CMB
generated in the volume
of each source was in equilibrium
with the matter only in this volume. When the CMB from each source fills the
volume
and starts mixing with the
radiation from nearby sources, the CMB energy density decreases from
to
. As a result, the SMB observed on
Earth is thermal radiation, the energy density of which in the Universe. is
.
In
model, the difference in
quantities of
and
is not taken into account, and it
is assumed that the energy density of the СМВ is equal to
J/m3 in the entire
space of the Universe at temperature
K of СМВ.
In
this case, the estimate of the CMB photon concentration in the form
m-3
applies to the entire Universe. Then the ratio of the number of CMB photons to
the number of nucleons will equal
, which is close in magnitude to the
ratio of the volumes
in (34).
Hence,
the following question arises: why is the number of photons so much greater
than the number of nucleons? This problem, known in cosmology as the entropy
problem, is usually solved via the concept of the hot Universe based on the assumption of adiabatic space expansion from the initial state of equilibrium of
radiation and matter.
In contrast, in our approach the numbers of СМВ photons and nucleons are
approximately the same, and there is no need for the hot Universe. Since the
SMB is currently not in equilibrium with matter, the formula for energy density
cannot be applied to the entire
Universe.
Indeed, the primordial gas-dust clouds, which were the sources of CMB in the early Universe,
were located in a discrete way, occupied a small volume and therefore could not
play the role of a global black body, limiting the volume of the Universe.
7. The angular harmonics of
CMB
Using the Fourier transform, the observed CMB power spectrum can be
expanded to include spherical harmonics [27-28].
The spherical harmonic
in the angular
power spectrum corresponds to the average value of the CMB temperature. The
dipole anisotropy on the CMB temperature distribution map has an amplitude of
approximately 0.1% and is related to the spherical harmonic
[29]. The
dipole anisotropy is well explained by the Doppler effect and by the motion of
the Earth together with the Sun relative to the reference frame, in which the
CMB intensity is the same in all directions. This motion changes the CMB
radiation wavelength measured on Earth, depending on the angle between the
Earth’s total velocity in cosmic space and the direction of the sky region from
which the CMB originates.
The spherical harmonics
are related to CMB temperature
fluctuations, the root-mean-square deviation of which reaches several tens of μK
relative to the average temperature. The
model assumes that such temperature
fluctuations could be caused by fluctuations in the density of matter in the
early Universe, which had the state of very dense hot plasma of electrons and
baryons.
One alternative explanation is that the angular power spectrum of the
CMB can be obtained if CMB photons, upon their appearance, interact with
matter, which was structured into some objects, clusters and particles [30]. The
average distance between the centers of the objects in the case of their cubic
arrangement is approximately 108 m, the mass of one object is
kg, and the mass density of the
object is
kg/m3. Similarly, there
are clusters inside the objects, the distance between the centers of which is
about 12 cm. If their mass density is
kg/m3, then the cluster
mass is
kg. The position and amplitude of the
main peak of CMB power spectrum at
and of the
subsequent peaks depend mainly on the mutual distances between the mentioned
objects, and on their mass density and internal structure.
It is assumed that the cluster contains 40 to 100 particles, such as
protons, helium nuclei and electrons; therefore, it represents an
atomic-molecular complex, containing hydrogen and helium. On average, an object
contains approximately
clusters. The results obtained for the structure of
objects, clusters and particles were found under the condition of using a
radiation wavelength equal to 1.9 mm. This wavelength corresponds to the
maximum blackbody spectrum distribution at the temperature
K and most exactly reflects the properties of
CMB from the standpoint of structural analysis. Moreover, the angular power
spectrum of CMB radiation is the same for all wavelengths of the CMB.
The presented parameters can be combined with the described scheme of
CMB emergence in the early Universe, in which matter evolution first leads to
formation of nucleons and electrons. Then gravitation compresses the matter
into gas-dust clouds and sets the matter particles in motion. When the
particles collide, the kinetic energy is converted into thermal energy and is
radiated in the form of CMB photons. The mass density of objects in [30] is
less than the mass density of gas clouds
kg/m3, as found in (26). We can
assume that the objects in [30] were located in the less dense part of the
shell of gas clouds. Then, CMB photons, passing through these objects, clusters
and particles inside them, can form the currently observed angular radiation
power spectrum.
The possibility that these objects, clusters and particles could appear
in primordial gas clouds follows from the value of the Jeans mass [31], which can be
simplified as follows:
.
(35)
The temperature
in (35) must be specified in K, and the
particle concentration
must be specified in
.
Let us substitute in (35) the cloud surface temperature
K (25) instead of
, and take
into account
kg/m3 (26) and the concentration of
cloud particles
m-3 instead of
. This gives
. The Jeans mass is less than the gas cloud mass
(27), which allows fragmentation of the
cloud into smaller structural components.
The nonuniform distribution of matter in cosmic space also contributes
to the small-scale fluctuations in the CMB temperature. Thus, correlations
between the optical radiation of galaxies and CMB fluctuations are described in
[32], and for radio sources, such correlations are presented in [33]. The cold
anomalies in CMB temperature are mysterious and cannot be explained from the
standpoint of the
model, the most famous of which is
the WMAP cold spot discovered by the WMAP space observatory in the Eridanus
constellation [34-35]. The cold spot is approximately
µK colder than the CMB temperature,
K.
These anomalies can be explained as follows. Since
for CMB, in the first approximation,
we have
. If we direct the radiation receiver exactly to the
anomalous spot, then in (6), we can set
,
, and we can
write the following:
According to (7) and considering the relation
, we find:
,
. (37)
Substituting
(37) into the
expression for
(36), we find the relationship between the
temperature difference
, the distance
and the volume
generating CMB
radiation and leading to the contribution
to the CMB
temperature
:
. (38)
Equation (38) assumes that the volume
contains
primordial gas-dust clouds functioning as CMB sources, which, on average, have
the mass density
kg/m3 (26) and the
concentration
m–3 (28) in the early
Universe. In this case, the concentration
is present in
(38) in two terms. An increase
in the term
leads to an increase of
, but the term
acts in the opposite way, reducing
. Thus, if in some direction in the volume
the concentration of sources differs
from the value
due to some anomaly, then this will
lead to a change of
in (38).
We can see from the relation
that if the
mass
of a typical
CMB source is constant, then the change in the concentration of sources
can be
associated with a local change in the mass density of baryons
in the volume
under consideration. Thus,
fluctuations in the mass density
in cosmic space
can influence fluctuations in the measured CMB temperature in various
directions.
According to (8), the redshift
in the model under consideration can
be related to the distance
by the formula:
. As an example, let us place a certain volume
at a distance corresponding to
, that is, at
Gpc. Let us assume that
equal to 20 μK, which is close to the value of the root-mean-square small-scale CMB
fluctuations. Using
further the relation
, the values
of
m (26) and
m–3 (28), from (38) we find
m3, which for a spherical volume
gives the radius of this volume of the order of
Mpc. Such the radius is close to the
radius of the known Giant Void in the constellation Canes Venatici [36].
Consequently, the presence of voids in accordance with (38) leads to the
observed CMB fluctuations.
It is known that, for sufficiently large spherical harmonics
the relation
holds true,
where
is the
effective sky viewing angle [28]. The main peak in the CMB angular power spectrum occurs
at
, which corresponds to the angle
. Moreover, if the harmonic number
and
decreases, and
the angle
and
increases, the
power in the angular spectrum decreases gradually without any particular peaks.
Why do harmonics with small
manifest in the spectrum in a
different way than harmonics with large
, which form the spectrum in the form of sinusoid
damping in amplitude?
For the above example with the volume
, let us calculate the angle
in radians
using the formula:
, and the angle in degrees
. The angle
in radians
corresponds to the spherical harmonic
in the CMB
angular power spectrum. It turns out that supervoids with a low density of
matter or, on the contrary, denser regions of space can make a significant
contribution to CMB temperature fluctuations only at small
. As for the appearance of spherical harmonics with large values
in the power spectrum, in the model presented
above, according to [30], they are explained by the fact that CMB radiation
interacts with matter, which is structured into some objects, clusters, and
particles. Thus, different mechanisms lead to different forms of CMB power
spectrum for small and large spherical harmonics. In contrast, the
model has difficulties explaining
the low power and form of the angular spectrum for harmonics associated with
large angles
and with small
[37].
8.
Infrared and optical background radiation
The dependence of the angular intensity
on the cosmic background radiation frequency
in [9] shows that there are other angular intensity peaks near the CMB,
including those of the cosmic infrared background (CIB) and the cosmic optical
background (COB). The total intensity of CIB and COB radiation is almost 10
times less than the intensity of cosmic microwave background radiation (CMB).
We can assume that the maximum
for the CIB is obtained at a radiation
frequency of
Hz, and for the COB the maximum occurs at a
frequency of
Hz. As a first approximation, let us assume
that the Wien displacement law for radiation from a black body is valid for the
radiation frequency. This gives the corresponding radiation temperatures
К and
К.
Substituting
temperatures
and
in (25) instead of temperature
makes it possible to estimate the surface
temperatures of CIB and COB sources in the early Universe:
K.
K. (39)
Substituting
temperatures (39) into (21-22) instead of
, we obtain the corresponding mass
densities and radii of CIB and COB sources. We can also estimate the masses of
sources by multiplying the mass density and the volume of the corresponding
source:
kg/m3.
m.
kg.
(40)
kg/m3.
m.
kg.
(41)
According
to (40), the sources of CIB radiation are gas-dust clouds with a radius of the
order of
AU. and with mass
. For comparison, in the Solar
System the dwarf planet Sedna at aphelion moves away from the Sun at a distance
of 937 AU. From (41) it follows that COB radiation sources are objects with
mass
and with a radius of the order of
, where
is the radius of the Sun.
In (26)
and in (27) it was found that a typical CMB radiation source has a radius of
pc and a mass of the order of.
. The sources of radiation CIB and
COB in (40-41) also have masses of the order of
. It turns out that during
cosmological evolution, CMB microwave radiation sources first become isolated
in the form of gas clouds with a radius of the order of
pc. When these clouds are subsequently
compressed by gravitational forces to a radius of the order of
AU, protoplanetary systems
containing gas and dust arise, leading to infrared background radiation CIB.
The compression of clouds slows down due to the appearance of pressure in the
gas, and the process of planet formation begins in the clouds. At the same
time, the bulk of gas and dust in the center of each cloud continues to
compress. As a result, primordial stars emerge, producing optical background
radiation COB. Nuclear reactions begin in the depths of these stars, preventing
the gravitational compression of matter. Thus, the CMB, CIB and COB emissions
are associated with the most long-term and equilibrium phases in the evolution
of primordial gas-dust clouds.
Since the
masses of CIB and COB sources approximately coincide with the mass
(27) of CMB sources, the concentration of CIB
and COB sources in the early Universe approximately coincides with the
concentration
m–3 (28) of CMB sources. Due to
their large masses, primordial stars that are the sources of COB should
transform into neutron stars. Thus, the concentration
can be considered as the concentration of
primordial neutron stars. The average distance between such stars can be
estimated using the formula
m or
kpc. On the other hand, the observable
Universe has a volume of the order of
m3, which contains about
stars [38]. The concentration of stars in the
Universe is on the order of
m–3. Comparing the concentration of
all stars with the concentration of primordial neutron stars leads to the fact
that there are about
ordinary stars per a neutron star. This ratio
of stars is indeed confirmed by observations.
Modern instruments allow us to measure angular power
spectra not only for CMB, but also for CIB radiation [39]. Thus, the methods
for analyzing the structure of radiating objects, developed in [30] for CMB,
can also be applied to CIB radiation. According to [30], the mass density of
the medium, which contains objects, clusters, and particles and is responsible
for the appearance of CMB angular harmonics, equals
kg/m3. This mass density does not
exceed the mass density in (40-41) of the objects, which can be the sources of
CIB and COB radiation. This implies the possibility that the cause of harmonics
in the CMB and CIB power spectra may be the same objects, clusters and
particles located in the shells of the corresponding gas-dust clouds at
different stages of compression of these clouds.
In (34) it was shown that the formula for the energy density of СМВ
J/m3
(20), where
K is the temperature of СМВ sources in the early Universe, cannot be applied to the entire
Universe. Instead of
, a significantly lower average volumetric energy
density of the CMB was calculated, equal to
J/m3 according to (33).
This was because the gas mass
occupying the
volume
in (34) in the initially
homogeneous Universe with the mass density
, only after being compressed into a gas cloud with a volume
and density
. would start radiating like a black body with the
temperature
K. As СМВ photons move through space, their energy
decreases due to cosmological redshift. In addition, photons interact with the
matter of many СМВ
sources and are partially scattered. As a result, the intensity of the СМВ radiation decreases, and the
spectrum of СМВ photons
becomes close to the observed spectrum of the radiation of a black body with
temperature
K.
For CIB and COB radiation the situation is largely similar. As in the
case of CMB radiation, CIB and COB radiation are nonequilibrium and for them
there is no global blackbody consisting of matter and bounding the entire
Universe. This means that in fact we always observe discrete sources of
radiation, which at large distances merge into an almost uniform background.
9. Discussion of results
A well-known problem of the Big Bang theory in cosmology is the complete
lack of understanding of the nature of such an explosion and of the origin of
matter as such. The subsequent use of the general theory of relativity in the
model adds new problems, such as singularities
and metric space expansion, which are incomprehensible from the perspective of
physics, the appearance of unidentified dark matter and mystical dark energy.
The use of multiple fitting parameters in the
model further undermines the
credibility of the modern version of the Big Bang theory.
In [40], six fitting parameters are listed, and it is concluded that
despite the accuracy of the results’ fitting, it is still not enough to
consider the
model correct. In [13], the
following conclusion was reached: ”However, in
cosmology, it has unfortunately been the case that even a long series of failed
predictions has not generally led to the rejection of theories, but rather to
their unlimited modification with ad hoc hypotheses, such as inflation,
non-baryonic matter, and dark energy.”
It is noted in [41] that it could be possible to improve the situation
with predictions in the
model if, in addition to the seven
fitting parameters of the model, we would assume, for example, the existence of
early or dynamical dark energy, neutrino interactions, cosmological models with
additional interactions, primordial magnetic fields, modified theories of
gravitation, etc.
On the other hand, cosmology in the theory of infinite hierarchical
nesting of matter finds the source and cause of origin of matter and the forms
of its existence in the uniform evolutionary process of transformation of the
main carriers at all matter levels [15]. This means, for example, that the
evolution of the matter of planets and stars at the stellar level of matter is
due to the evolution and action of carriers belonging to lower matter levels. Each
matter level has its own main carrier as the most stable and balanced object,
such as a neutron star, nucleon, praon, graon, etc., respectively. The
similarity principle assumes the existence of the same coefficients of
similarity in mass, size and speed of processes between the respective objects
of the adjacent matter levels, which allows us to find the physical parameters
of the main carriers of matter. As a consequence, a neutron star contains as
many nucleons as each nucleon contains praons, and as each praon contains
graons.
The main driving forces for matter evolution are electromagnetic and
gravitational forces, which can be reduced to the action of carriers of the
lowest matter levels, moving at relativistic speeds [10], [42-46]. This
point of view is supported in [47] by the fact that the evolution of matter in
the early Universe turns out to be little dependent on external factors and is
determined mainly by internal factors.
It follows from the principle of similarity of matter levels that the
analogs of a neutron star at the nucleon level of matter are nucleons, and the
analogs of white dwarfs are the so-called nuons [4], which have the same mass
range as nucleons. Nuons are similar in their properties to muons, but the
origins of these particles are different: nuons appear similar to white dwarfs
in the course of long-term evolution of matter, and muons appear mainly in the
rapid decay of pions, while pions are assumed to be the analogs of low-mass and
therefore unstable in the decay of neutron stars. Moreover, neutral nuons play
the role of dark matter, which manifests itself through gravitational effects
both on the motion of stars and gas clouds inside galaxies, and on the motion
of galaxies themselves during their interaction [48]. In contrast, the
model has difficulties explaining
dark matter, describing its evolution and origin.
The CMB generation process continues to occur today, although on a
smaller scale. The properties of the coldest dark nebulae with masses up to
are quite close to those of primordial
gas-dust clouds. Thus, practically opaque Bock globules, which are distinguished
by their black color, have a temperature in the range from several degrees to
30 K and a typical mass of up to
. From the
standpoint of thermal radiation, such objects can model the properties of a
blackbody quite well. Here, we provide as examples references to
the spectra of the infrared sources IRS 1 and IRS 2 in [49-50] and to the
spectrum of the Bock globule B335 in [51].
One review [52] described the properties of 248 small molecular clouds,
most of which are Bok globules. It is assumed that in our Galaxy system the
average distance between such globules is 600 pc, and the average mass of a
globule is approximately
. This distance can be compared with the value
kpc found for the distance between
the primordial gas-dust clouds of the early Universe through the concentration
of CMB sources in (28).
According to [52], for most globules the radiation temperature of gas
does not exceed 4.5 K, and the kinetic temperature does not exceed 8.5 K. Since
globules are heated by radiation from the surrounding star background, the dust
temperature in globules turns out to be higher than the gas temperature and
depends on the measured frequency band and on the size of the dust particles.
On average, the dust temperature is close to 25 K. Under such conditions, the
spectrum of some globules appears to be not the blackbody spectrum at one fixed
temperature, but rather the sum of the spectra of individual components
consisting of gas and dust.
In [53], by analyzing the absorption lines of water molecules in a large
cloud of water vapor near the HFLS3 galaxy, it was found that the temperature
required for this exciting radiation ranges from 16.4 to 30.2 K. Since the
HFLS3 galaxy has a redshift of the order of magnitude
and is located sufficiently far away, this
temperature is considered from the point of view of the
model as the CMB temperature at an earlier
time. Moreover, due to the space expansion since then, the CMB temperature
should have decreased to the current value of
K.
On the other hand, radiation at a temperature ranging from 16.4 to 30.2
K is quite typical for gas clouds and Bok globules under the action of
radiation from surrounding stars, including those in the most distant galaxies.
In the model
we are considering, the CMB temperature at the moment of emission coincides
with the temperature
K (25) of gas-dust clouds with masses on the order of
, so distant from us that their
redshift is much greater than the redshift of the observed galaxies.
How does the CMB radiation spectrum almost exactly correspond to the
blackbody spectrum? Here, the following circumstances can be taken into
account. First, we assume that there were no stars around the primordial
gas-dust clouds of the early Universe that could noticeably heat the clouds and
influence the form of the clouds’ spectrum. Then, the spectrum of each cloud
could be sufficiently close to the spectrum of a blackbody with the temperature
K.
Another circumstance is associated with the size of the visible
Universe. Substituting in (8) the maximum measured value of redshift
for the CMB
according to [54] at
km/(s·Mpc), we find the radius of the
visible Universe
m or 30 Gpc.
Light can travel this distance in
billion years. This time is less
than the minimum compression time
billion years, which was found
according to (16) for the compression of all baryonic matter during the
formation of the visible Universe.
It should be noted that when measuring CMB intensity, it is necessary to
exclude radiation from bright point sources such as clusters of stars and
galaxies from the obtained data to determine the background radiation
precisely. However, the redshift of the most distant observable galaxies does
not exceed
. For example, the redshift of the galaxy GN-z11
equals
according to
[55]. This redshift is significantly less than the redshift of the CMB, which
reaches
. Thus, CMB radiation travels the main part of its way
in unexplored distant regions of cosmic space.
In (6-7) the fact was used that the cross sections of CMB sources in the
early Universe and the concentration of sources are such that at very large
distances, these cross-sections begin to overlap each other; and, therefore,
the Beer–Lambert law becomes valid. As a result, the CMB radiation coming to
the Earth from distant sources has enough time to interact with the matter of
multiple closer sources and additionally thermalize. This approach inevitably
turns the CMB spectrum into an averaged spectrum that is close to the
equilibrium spectrum of a blackbody.
The presented model is consistent with the results in [56], where the
so-called virial gas clouds located in the halo of galaxies make it possible to
explain the rotational anisotropy observed in the CMB. In [57], within the
framework of the standard model of the expanding Universe, the evolution of
virial clouds from the surface of the last scattering to the formation of
primordial stars of population III was considered. These virial clouds, which
are also in thermal equilibrium with the CMB, as in our approach, have almost
the same density as the primordial gas-dust clouds in our model. Thus, the
conclusions in [56-57] concerning primordial gas-dust clouds prove our
calculations.
The Earth and the Sun are known to move relative to the reference frame,
in which the CMB is isotropic, at a speed of approximately 370 km/s. If we take
into account the motion of the Sun in our galaxy and its motion in the Local
Group of Galaxies, then the speed of the Local Group of Galaxies relative to
the CMB’s isotropic reference frame will be about
km/s [58]. In the
model, the cosmological redshift is
interpreted as a result of the Universe expansion, which has the mathematical
meaning of a change in the spacetime metric, caused by an unknown factor. The
physical meaning of this space expansion is an obvious subject for discussion
regarding the justifiability of the use of mathematical hypotheses in the real
physics of phenomena. It is assumed that at large distances from the Earth,
galaxies and other objects, located there, are moving away from each other at
tremendous speeds due to space expansion. These speeds can significantly exceed
the speed
of motion of
the Local Group of Galaxies relative to the isotropic reference frame of the
CMB. So why from the entire speed spectrum do we observe a relatively small
speed
, is it by chance?
From the viewpoint of the theory of infinite hierarchical nesting of
matter, the answer lies in the fact that, for matter evolution and for the
emergence of a new matter level with more massive objects, neither the Big
Bang, nor the metric expansion of spacetime or high speeds of motion are needed. The deviation of the speed of galaxies and star clusters from the speed
of the CMB’s isotropic reference frame can be caused only by the gravitational
action of galaxies on each other. When averaging the matter’s speeds over the
volume of the visible Universe, the obtained average speed must coincide with
the speed of the CMB’s reference frame because CMB occurs in the early Universe
and, on average, is stationary relative to the global distribution of matter.
Taking this into account, the problem of space flatness on cosmological
scales becomes understandable when even at very large distances, spacetime is
practically not curved. Therefore, there is no great need to calculate any
curved metric, which is always needed in the general theory of relativity, even
in flat Minkowski spacetime. In this case, instead of the general theory of
relativity, it is more convenient to use the covariant theory of gravitation
[59-60], in which the metric effects are separated from the gravitational
effects. This means that gravitation does not depend on a metric; rather, it is a
real physical force, such as the electromagnetic force, which exists even in
Minkowski spacetime, when there is no spacetime curvature.
Paradoxes arising from the concept of space expansion were analyzed in
[61], such as the violation of the law of conservation of energy for local comoving volumes, the Newtonian form
of Friedmann's equations, the superluminal velocities of distant galaxies as a
result of space expansion, and Hubble's law in inhomogeneous distributions of
galaxies, etc. The main reason for the appearance of such paradoxes is the
general theory of relativity due to the absence of the energy-momentum tensor
of the gravitational field in this theory, which casts doubt on the possibility
of using this theory in cosmology.
It was noted in [62] that the time scale in the
model does not correspond to the
time, which was required for the formation of large galactic clusters and voids
in the early Universe. In this regard, it is assumed that this discrepancy may
be due to the use of the general theory of relativity, which should be replaced
with another gravitation theory, for example, modified Newtonian dynamics
(MOND). The authors of [62] draw the following conclusion from their article:
at the present moment, we understand neither the distribution of matter and
energy in the Universe nor the law of gravitation, which governs this.
It was found in [63] that a supercluster of galaxies with a radius of
about 6 Mpc rotated at an angular velocity
equal to
degrees per 10
billion years, or
s-1.
According to [64], large galactic clusters with sizes on the order of
Mpc can
experience general motion at velocities up to
km/s. Assuming
that this motion arises from rotation, for the angular velocity in the first
approximation, we have
s-1. The large-scale
structure of the Universe has the form of a cosmic web and consists of
individual filaments that contain galactic clusters. The difference
in the linear
velocity of rotation of different points in the filaments can reach 100 km/s at
a distance
between the
points equal to 1 Mpc, which gives an estimate of the angular velocity of
rotation
s-1
according to [65].
If we assume that the entire visible Universe also rotates, then its
limiting rotation can be estimated by the formula for the first cosmic
velocity, assuming that the matter at the edge of the Universe is in
equilibrium between the gravitational force and the centripetal force:
.
where
,
and
denote the mass, radius and mass density of
the Universe, respectively. Substituting here the mass density
kg/m3 instead of
, we find
s-1, which has the same order of
magnitude with respect to the rotation of large galactic structures. This
rotation corresponds to a period of approximately 830 billion years.
It is obvious that any general rotation of the observable Universe
contradicts the Big Bang since, due to rotation the Universe would have a
nonzero angular momentum. In the scenario of the Big Bang and subsequent
inflation up to the state of the observable Universe, it turns out that, taking
into account the law of conservation of angular momentum, the object that gave
rise to the Universe should have had an enormous angular momentum for its small
size, which seems completely improbable. At the same time, in the hierarchical
model, the object, from which the early Universe was formed could consist of a
huge cloud of praons. If this cloud with the sizes of the order of the
observable Universe had any general rotation, then the emerging Universe would
have the same rotation after the evolution of praonic matter and its
transformation into nucleons and nuons.
We believe that other, less complex cosmological problems can also find
their solution within the framework of the theory of infinite hierarchical
nesting of matter and a stationary Universe. For example, in [66] it is
indicated that expansion of space is not required to explain the change in
luminosity in the spectra of supernovae. Thus, cosmology can be constructed
with a minimum of assumptions and paradoxical conclusions that contradict the
traditional logic of physics.
10. Conclusions
Cosmic microwave background radiation (CMB) along with the effect of the
cosmological redshift of radiation spectra are usually considered phenomena
that find an acceptable explanation within the framework of the Big Bang
theory. Indeed, these phenomena are rather difficult to explain, which
eventually led to the idea of the Big Bang. However, due to the significant
drawbacks of this theory, which are described above, we consider this theory to
be too exotic and radical and suggest another explanation for emergence of CMB.
In our approach, the necessary source of CMB energy turns out to be
gravitational energy, which, under matter clustering in primordial
gas-dust clouds in the early Universe, is released in the form of the kinetic
energy of motion of matter particles, according to the virial theorem. The
subsequent collisions of particles convert kinetic energy into thermal energy,
heating the particles, so that gas-dust clouds can radiate as black bodies at
the temperature
K (25). During the time until CMB radiation
from distant regions of the Universe reaches the Earth, the temperature of this
radiation decreases to the value
K.
Based on this approach, we first find formula (7) for the volumetric
power
of CMB energy
generation in cosmic space, and then we find the main characteristics of primordial gas-dust
clouds, including their radius
pc (26), mass
(27), volume concentration of clouds
m–3 (28) and distance
between neighboring clouds
kpc. For the volumetric power
of CMB energy
generation, the value
W/m3 (29) is obtained,
while the generation power per nucleon of a typical gas-dust cloud, as well as
per nucleon in the early Universe, is equal to
W/nucleon (30).
We can conclude that the CMB originated as thermal radiation from primordial
gas-dust clouds. This
thermal radiation could interact with a large number of particles in each
cloud, which, in view of the slowly changing equilibrium state of the clouds
and their opacity and weak reflection, provides the CMB radiation spectrum
close to that of blackbody radiation. In addition, CMB radiation coming from
very large distances passes through many separate CMB sources in the form of
gas clouds on its way to Earth. This further contributes to the transformation
of the CMB spectrum into a blackbody spectrum.
As indicated in Section 6 with reference to [30], the angular harmonics
in the CMB power spectrum can be explained if we take into account matter
clustering near the surface of primordial gas-dust clouds. This possibility is supported by the
presence of both small and large dust particles observed in Bok globules,
leading to significant polarization of radiation in the millimeter range
[67-69] up to values on the order of 10 % or more. In this regard, the degree of
polarization of the CMB is also approximately 10 %. Thus, the primordial
gas-dust clouds generating CMB during their evolution could take the form of
globules.
In addition to CMB, the approach under consideration can be applied to
infrared background radiation (CIB) and optical background radiation (COB). The
estimates made in Section 7 give reason to believe that the CIB emission could
have originated in protoplanetary clouds, while the contribution to the COB
emission was made by primordial stars.
Although the blackbody CMB radiation coming to the Earth from all
directions has an intensity
, this does not mean that the ubiquitous occurrence of
CMB energy density in cosmic space is equal to
J/m3, similar to
blackbody radiation. As shown in (33), the average CMB energy density in the Universe should
equal
J/m3. This happens because the CMB is
radiation that is not in equilibrium with the global blackbody. Indeed, all CMB sources cannot form a closed surface entirely
surrounding the radiation of the Universe, which is a necessary condition for
the validity of the formula
. The same applies to CIB radiation and COB radiation,
which are also nonequilibrium.
Due to the difference between the energy density
and the energy density
(20) of blackbody radiation, it becomes
possible to move away from the model of the hot expanding Universe. It follows
from this model that the CMB energy density is equal to
everywhere, so
that the ratio of the number of photons to the number of nucleons is equal to
, which is close in magnitude to the ratio of volumes
in (34). In our
approach, the energy density
corresponds to the condition of
practically the same number of photons and nucleons, which does not lead to the
problem of excess photons over nucleons or to the need to introduce the hot
Universe model.
Statements and declarations
The authors have no relevant financial or non-financial interests to
disclose.
Data availability
The data underlying this article are available in the article and in its
online supplementary material.
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