The nature of Dark Matter is one of the most pressing open problems of modern cosmology    . Today, evidence for its existence is firmly established due to a wide array of independent experiments and observations      . The proposed candidates to explain the nature of dark matter span over 90 orders of magnitude in mass, from ultra-light bosons to massive black holes     . A popular class of dark matter candidates are weakly interacting massive particles (WIMPs)     . Neutrinos are weakly interacting particles that were almost certainly created in great abundance during the big bang. Although they are believed to constitute part of the dark matter, they are one of numerous other candidates that were and are still being considered. Some candidates for dark matter, like neutrinos and axions, are included in the Standard Model, but most WIMPs candidates come from beyond it. The most widely studied candidate beyond the Standard Model is probably the supersymmetric neutralino. Other supersymmetric candidates for dark matter include zxinos (the supersymmetric partner of the axion), and gravitinos.
Another popular class of dark matter candidates are baryonic matter tied up in brown dwarfs or in chunks of massive compact halo objects, or MACHOs    , including primordial black holes (PBHs)  .
Dark energy remains a complete mystery. The common prejudice is that it is some unknown substance, with an enormous anti-gravitational force, which drives the galaxies of our universe apart in accelerated motion    . One explanation for dark energy is founded on Einstein’s Cosmological Constant (Λ). According to this explanation the universe is permeated by a negative energy density, constant in time and uniform in space. The big problem with this explanation is that for Λ ≠ 1, it requires that the magnitude of Λ be ≈ 10120 times the measured ratio of pressure to energy density. An alternative explanation argues that dark energy is an unknown dynamical fluid, i.e., one with a state equation that is dynamic in time, Λ = Λ(t). This type of explanation is represented by theories and models that differ in their assumptions regarding the nature of the state equation dynamics     . This explanation is no less problematic than the first one, as it entails the prediction of new particles with masses thirty-five orders of magnitude smaller than the electron mass, which might imply the existence of yet unknown forces. At present there is no persuasive theoretical explanation for the existence and dynamics of dark energy. Although recent research indicates that dark matter and dark energy interact with each other   , most physicists believe that dark energy is a completely different entity than dark matter, and that the two are uncorrelated.
Given the lack of knowledge about the nature of dark matter and dark energy, most experts contend that understanding the content of the universe and its cosmic acceleration requires nothing less than discovering a new physics. As an example, the Dark Energy Task Force (DETF) summarized its 2006 comprehensive report on dark energy by stating that there is consensus among most physicists that “nothing short of a revolution in our understanding of fundamental physics will be required to achieve a full understanding of the cosmic acceleration”  (p. 6). The question of dark matter is important not only for cosmology and astrophysics; it is of great importance to particle physics. Since the Standard Model does not provide a satisfactory dark matter candidate, many contend that dark matter is therefore evidence for physics beyond the Standard Model  .
Here we take a completely different approach than all contemporary physics to explain dark matter, dark energy, and the interaction between matter and dark matter in the universe. Our approach is relativistic, based on our recently proposed Information Relativity theory (previously termed Complete Relativity theory)    . The theory, described briefly in Section 2, is an axiom-free “relativizing” of Newtonian physics, accomplished only by account for the time travel of waves (e.g., light) from one reference frame to another. An important feature of the theory is that it applies to all bodies of mass, regardless of their size, mass, and composition. Hence we will not entertain questions pertaining to the Standard Model of elementary particles, nor to its many extensions. As will be clear in the proceedings, the question that we shall attempt to answer is not what particles may constitute dark matter, but rather how dark matter and matter coexist and interact, and what parameters affect their relative energy densities in the universe. With regard to dark energy, the surprising possibility arising from our analysis is that it is nothing but the energy carried by dark matter.
The following sections are organized as follows: In section 2 we summarize the main tenets of Information Relativity theory, and depict its main transformations. In section 3 we apply the theory to a simplified model of the Universe, in which large-scale celestial bodies, like galaxies and galaxy clusters, are compact bodies receding rectilinearly along the line-of-sight of an observer on Earth. In our simplistic model we neglect contributions to dark matter caused by the rotation of celestial structures (e.g., the rotation of galaxies), and of their constituents (e.g., rotation of stars inside galaxies). For such a grossly simplified universe, we define dark matter, and derive exact terms for the dynamics between matter and dark matter densities, and of their respective energy distributions in the universe, as functions of the recession velocity. In section 4 we express the derived terms as functions of the redshift z, and utilize the theoretical results to explain the GZK cosmic rays cutoff at z ≈ 1.6   , and the “cosmological desert” at higher redshifts. In section 5 we propose a novel physical explanation of dark energy, according to which dark energy is simply the energy carried by dark matter. We corroborate our explanation by comparing the predicted amounts of the energy carried by dark matter in different ranges of redshift, with observed results based on ΛCDM cosmologies, and by comparing the predicted equality of matter and dark matter energy densities at redshift z = 0.5, with observational data on what is known as the “coincidence problem”, namely the observed equality between the densities of matter and dark energy at redshift z ≈ 0.55    . In Section 6 we summarize and draw main conclusions.
2. Information Relativity Theory―A Brief Description
A complete formulation of information relativity theory (IR) and its applications to various field in physics, including small particles physics, quantum mechanics, and cosmology, are detailed elsewhere    . For convenience, derivations of the main theory transformations are included in Appendix A.
Before describing the model, and its application to the cosmology of the universe, it is in order here to caution the reader that he or she will probably find difficulty in the absence of the terminology used in the literature. Primarily, we do not use the concept of spacetime. Space and time are treated by us independently, just like Newton did. We refrain from using variables that are not completely understood physically like vacuum energy, or arbitrary parameters like the cosmological constant. All the terms used to construct the theory are observable physical variables.
In principle, information relativity theory is nothing more than “relativizing” Newtonian physics, which we accomplished by accounting for the time travel of information from one reference frame to another. As will become clear from the derivation of the theory’s transformations, the scale of the system is of no importance. In several previous articles we showed that not only does the theory reproduce quantum theoretical results, including entanglement  , and particles’ wave-like diffraction in the double-slit experiment  , but it also explains them in simple mechanical terms.
We note that unlike Special Relativity theory, in which the relativity of time is achieved by axiomatizing the constancy of light velocity, relativizing time, and other physical entities in Information Relativity theory is a force majeure of the fact that information does not pass between two points in space instantaneously, but rather suffers delay, which depends on the spatial distance between the two points and the velocity of the information carrier.
The rationale behind the theory is extremely simple and straightforward. It can be illustrated as follows: Consider the case where information from a “moving” body, is transmitted to a “stationary” observer by light signals. Assume that the start and end of an occurrence on the body’s reference frame are indicated by two signals sent from the body’s “moving” reference frame to the “stationary” observer. Because light’s velocity is finite, the two signals will arrive to the observer’s reference frame with delays, determined by the distances between the body and the observer at the time when each signal was transmitted. Suppose that the “moving” body is distancing from the observer. In this case, the termination signal will travel a longer distance than the start signal. Thus, the observer will measure a longer occurrence duration than the occurrence duration at the body’s reference frame (time dilation). For approaching bodies, the termination signal will travel a shorter distance than the start signal. Thus, the observer will measure a shorter duration than the duration at the body’s reference frame (time contraction). Notice that for the above scenario, no synchronization of the clocks at the two reference frames is required.
For the simple case of rectilinear motion with constant velocity v, expressing the above mentioned example in the language of mathematics detailed elsewhere    (as well as in section 1 in Appendix A) yields the following equation:
where is the occurrence’s time duration as measured by the observer, is the occurrence’s time duration at the body’s rest-frame, and is the relative
velocity, . Derivations of the transformations of length, mass, and energy,
are detailed in Appendix A. The resulting transformations are depicted in the middle column of Table 1. The transformation in terms of redshift z depicted in the right-hand column will be explained later on. For β → 0 (or ), the time, length, matter and energy densities, depicted respectively in the first four rows, reduce to the comparable Newtonian terms. The two new non-classical terms emerging in the model are the dark matter density and its kinetic energy depicted in the last two rows.
Table 1. Information relativity transformations for inertial rectilinear motion ( ).
The dark (unobservable) matter density term is defined in the present framework as the difference between the Newtonian and relativistic matter density terms, or:
Similarly, the energy density carried by the dark matter is defined as the difference between the Newtonian and relativistic matter energy densities:
The picture emerging from our analysis thus far suggests that at any given recession velocity, matter and dark matter co-exist in a dynamic duality, with matter decreasing in density and dark matter increasing in density as functions of the recession velocity β. Thus, in our model matter and dark matter are interchangeable, accelerating the velocity of a receding body of mass is predicted to increase its dark matter at the expense of matter, vice versa, decelerating a receding body of mass is predicted to increase the portion of its matter at the expense of dark matter.
It is worth noting that as β → 0, the density of dark matter and its associated energy ( , ) approach zero, and Newtonian mechanics under constant rectilinear velocity is recovered. Also, since no restrictions were put on the size of the moving mass, the derived results apply equally well to mesoscopic and microscopic rectilinearly receding bodies of mass. Generalization of the results for motion in a gravitational field is detailed in  . In recent papers we demonstrated that Information Relativity theory, without adding any free parameter, is successful in predicting and explaining several important cosmological and astrophysical phenomena      , the neutrino velocity reported by OPERA and four other collaborations  , as well as quantum phenomena, including quantum entanglement, and the wave-like diffraction patterns of single particles in the double-slit experiment   .
3. Dark Matter and Its Dynamical Interaction with Matter, as Functions of the Recession Velocity
To construct a simple cosmology of the universe we assume a grossly simplified model in which galaxies and galaxy structure are infinitesimal, uncharged, and non-rotating masses, receding from us. We take this as an approximation of the universe at high enough redshifts. For any celestial body receding from us with velocity β, Figure 1 depicts the densities of observable matter, and dark (unobservable) matter as functions of velocity.
As could be seen, the densities of matter and dark matter are mirror images of
one another. They coincide when the recession velocity is exactly , with matter dominating at recession velocities , and dark matter dominating at recession velocities . As examples, for a recession velocity β =
0.01 the model predicts a composition of about 98% matter and 2% dark matter, whereas as for a high relativistic velocity of β = 0.99 the predicted composition is 0.5% matter and 99.5% dark matter. Metaphorically, we can think of matter and dark matter as two strictly competitive Siamese twins, with one increasing its density at the expense of the other. The ratio of dark matter to matter densities depends only on the recession velocity as depicted in the following equation (see also Figure 2):
Figure 3 depicts the matter and dark matter energy density distributions, as functions of the recession velocity β. As could be seen in the figure, for a receding body of mass, dark matter density increases rapidly with β. For β = 1, all the energy is stored in the body’s dark matter, which travels at a velocity equaling the velocity of light. The matter energy density displays an interesting non-monotonic behavior. It increases with β up to a maximum at velocity β = βcr, and then decreases to zero at β = 1. The emerging type of non-monotonicity is quite surprising. No less surprising is the value of β, at which the matter energy density achieves its unique maximum. Differentiating Equation (4) with respect to β, and equating the result to zero yields:
which solves for:
Figure 1. Relative matter and dark matter densities (and their relative energies) as functions of the recession velocity β.
Figure 2. Dark matter to matter ratio as a function of the recession velocity.
Figure 3. Matter and dark matter energy density distributions, as functions of the recession velocity β.
where is the famous Golden Ratio   . Substituting in Equation (4) yields:
From Equation (8) we can write: , which implies and . Substitution in Equation (10) gives:
Figure 3 shows clearly that the point is a point of phase transition, after which matter changes behavior. While for an increase in the recession velocity is associated with increase with the matter’s energy, for an increase in velocity is associated with decrease in energy. Quite interestingly,
the relative matter energy density at this point, , is equal (to the eighth
decimal digit) to Hardy’s maximum probability of obtaining an event that contradicts local realism  . This equivalence has been underscored by us in a previous publication  , as well as by Hans Hermann Otto in a recently published paper in this journal  . Moreover, the Golden Ratio velocity, at which the phase transition is predicted to occur, echoes nicely with the result of a quantum mechanical experiment published in Science, which demonstrated that applying a magnetic field at right angles to an aligned chain of cobalt niobate atoms, makes the cobalt enter a quantum critical state, in which the ratio between the first two resonances equals the Golden Ratio  . Since our theory is scale independent with respect to the moving body’s mass, we conjecture, with high certainty, that the critical recession velocity is the point of quantum phase transition at cosmological scales.
4. Dark Matter and Its Dynamical Interaction with Matter as Functions of Redshift
Since our objective is to apply the theory to the cosmology of the universe, the theory transformations in terms of redshift are added in the right column in Table 1. Their derivation is straightforward, and is detailed elsewhere   (see also Appendix B). The relationship between the redshift z and the recession velocity β (see Appendix B) is found to be:
And the inverse relationship is:
Substituting Equation (13) in the transformations depicted in the middle column in Table 1 yields the transformation as a function of the redshift z depicted in the right side column of the table. Figure 4 depicts the energy densities of matter and dark matter as functions of z. The relative densities of matter and dark matter, and their respective energies, are depicted in Figure 5.
As shown in Figure 4, the maximal matter energy density, which marks the point of cosmic quantum phase transition, is predicted to occur at a redshift of . This prediction fits quite nicely with the well-known GZK cutoff limit of the cosmic-ray energy spectrum   , found to exhibit a breakdown in the luminosity densities of both QSO’s and AGN’s at redshift z ≈ 1.6.   , and with a recent discovery of extremely high luminosity galaxies at a redshift of exactly 1.618  . Moreover, as shown in Figure 4 and Figure 5, for the investigated model of the universe, matter is predicted to dominate at redshifts
z < 0.5 (corresponding to recession velocities ), and dark matter is predicted to dominate at redshifts z > 0.5.
5. Dark Energy
Our model proposes a completely different, and far more plausible explanation about the nature of dark energy. It is not a mysterious negative vacuum energy.
Figure 4. Matter and dark matter energy density distributions as functions of redshift z.
Figure 5. Relative matter and dark matter (and their relative energies) densities as functions of redshift z.
It is the energy carried by the dark matter. Luckily, the name given to dark matter fits well with our explanation. As a post hoc test of our explanation of dark energy, we calculated the proportions of the energies of matter and dark matter at a given redshift range z and compared it with observed results based on ΛCDM cosmologies.
From Equations (4’) and (6’) in Table 1 we can write:
The ratio of the energy densities of the dark to matter is:
The energy of matter and dark matter in any redshift range are obtained by integrating expressions 14 and 15 with respect to z, yielding:
Calculations based on the above expressions are in good agreement with observations. As an example, it was concluded by Wittman et al. (2000)  that for the redshift range 0.6 - 1, dark matter is distributed in a manner consistent with either an open universe, with , , , or with a ΛCDM with , , , where is the fraction of critical density in baryonic matter, is the fraction of all matter, and is the fraction of dark energy. In the open universe model, we have , and , whereas in the ΛCDM, we have , and . Calculating the ratios of matter and dark matter energies from Equations (17) and (18) for the same redshift range gives:
which are in good agreement with the observations based ΛCDM model with
( , ). For the entire range of semi-classical matter (0 ≤ z < 1.618) we obtain: , and , yielding:
(or 23%) (21)
(or 76.7%) (22)
Which are in excellent agreement with the ΛCDM cosmology with ,    , and quite close to the , cosmology    .
Another supporting evidence for our conjecture that dark energy is the energy carried by dark matter, is the recent observations of what is termed the “coincidence problem”, namely, the question why “now” at a redshift z ≈ 0.55 the densities of matter and dark energy are equal    . As Figure 4 and Figure 5 clearly show, the energy densities of matter and dark matter are predicted to be
equal at z = 0.5 (corresponding to a recession velocity of ). Considering
the simplified assumptions made in the discussed model of the universe, the theoretical prediction is in good agreement with the ‘coincidence problem” observational data.
6. Summary and Main Conclusions
The nature and properties of dark matter and dark energy in the universe are among the outstanding open issues of modern cosmology. The tremendous effort to answer the question “what is dark matter made of?” has so far been unsatisfactory. Most effort was, and is still being, invested in searches for particle dark matter candidates, partly within the Standard Model of elementary particles, but mostly among its supersymmetric extensions.
The different approach taken here is based on our recently proposed Information Relativity theory    . Rather than theorizing about the elementary particles that might qualify as candidates for dark matter, we investigated the relativistic effects on large-scale cosmological structures in their recession in the universe. We defined the mass of dark matter as the complimentary portion of the relativistic mass, such that at any given recession velocity the sum of the two is equal to the Newtonian mass. The emerging picture from our model could be summarized as follows:
1) For a body in recession, matter and dark matter co-exist in a dynamic duality, with matter decreasing in density, and dark matter increasing in density as functions of the recession velocity β (and Redshift z) (see Figure 1 and Figure 5). We conjecture that at recession velocity β 1 (v c), which corresponds to redshift of z ∞, dark matter transforms to a gravitational wave.
2) Contrary to the current conjecture that dark energy is something different than dark matter, a mysterious negative vacuum energy of unknown source, our model suggests that dark energy is the energy carried by dark matter. With respect to the discovery that the universe expands with acceleration   , we propose that the observed acceleration is not a result of a negative energy of yet
unknown source, but rather the aftermath of the decrease (as function of ) in
the gravitation pulls between galaxies as they become more distant from one another. Metaphorically speaking, we contend that the universe is accelerating, not because someone is pressing on the gasoline pedal, but because he or she is gradually releasing the pressure from the brake pedal.
3) At a recession velocity β equaling the Golden Ratio (≈ 0.618), or equivalently z ≈ 1.618, matter undergoes a critical quantum phase transition (see Figure 3 and Figure 4). This prediction provides an explanation, at least partly, to the GZK cosmic rays cutoff at redshifts z ≈ 1.6. According to our model, up to the critical point, the universe is comprised of matter and dark matter, whereas at redshifts higher than ≈ 1.618 the “cosmic desert” is comprised of quantum matter and dark matter (see Figure 4). It has been recently argued that the difficulty in tracing the Hubble diagram of the universe in the high redshift range of above z = 1.7 is a limitation of the use of supernovas as calibration candles, due to their limited intrinsic luminosity and extinction from the interstellar medium. Luminosity correlations of long gamma-ray bursts (GRBs) were proposed as a complementary method for high redshifts  . Our analysis suggests that the “cosmological desert” at high redshift is not only a measurement problem, which could be overcome with further refinements of existing measurement methods, but is mainly attributed to the quantum nature of matter at redshifts higher than ~1.618.
4) Matter dominates the universe at z < 0.5, and dark matter dominates at z > 0.5. In good agreement with observational data, the two components are predicted to be equal at z = 0.5. This could provide a physical explanation to the “coincidence problem”, namely the question why “now”, at a redshift z ≈ 0.55, the densities of matter and dark energy are equal    .
5) The emergence of the Golden Ratio symmetry in our analysis as a key player in the structure of the Universe, echoes nicely with many discovered Golden Ratio symmetries in nature, science, technology, and the arts, including in the structure of plants    , quantum matter    , the human brain  , human economic behavior     , music   , and aesthetics  .
We note that the emerging duality between matter and dark matter holds much in common with the realistic matter-wave duality in quantum mechanics, first conjectured by Louis de Broglie  . In the de Broglie-Bohm model of quantum mechanics     , the dual wave of a fast traveling or spinning particle is real, piloting its dual corpuscular mass. Similarly, in our theory dark matter is unobservable matter accompanying its dual observable matter. For extremely high velocities (β → 1), matter diminishes, while dark matter, which carries most of the total energy, becomes wave-like, just like de Broglie’s pilot wave. Moreover, our model suggests that the recently detected gravitational waves   , believed to be disturbance in the “fabric of spacetime”, are fluctuations in real wave-like dark matter, traveling at quasi-luminal velocities. The possibility that LIGO had in fact detected dark matter has been recently suggested  .
It is worthwhile to stress that the cosmology proposed here is based on a very simplified model, in which galaxies, or even galaxy-clusters, are represented as point masses receding rectilinearly along the line of sight of an observer on Earth. Real galaxies and galaxy structures are in rotation relative to an Earth’s observer, and the stars and planets in each galaxy are also in continuous rotation. The observed rotations of all celestial structures are major sources of dark and quantum matter. The process of their production due to the structures’ rotational motion could be analyzed in a similar way to the current analysis. We have already embarked on the analysis of the production of dark and quantum matter due to rotational motion, and of the spatial entanglement between the dark matter dispersed spherically at their halos. We conjecture that the physical entanglement of dark matter in space is medium by which gravitational forces between bodies are enacted. It is well accepted that dark matter is the “gravitational glue” that keeps galaxies and galaxy structures bound together. Our preliminary analysis confirms this.
I wish to thank Dr. Raid Saabni and three anonymous reviewers for their helpful remarks.
Derivation of Information Theory’s Transformations
In sections 1a-4a we derive the theories transformations of time, length, matter density, and energy density, as functions of the recession velocity β.
1a. Time Transformation
Consider two reference frames, F and
, moving with constant velocity v with respect to each other. A “stationary” observer in frame F defines events with coordinates t, x, y, z. Another observer in
defines events using the coordinates t', x', y', z'. For simplicity, assume that the coordinate axes in each frame are parallel (x is parallel to x', y to y', and z to z'), and that the two systems are synchronized, such that at
. Now consider the case in which a physical occurrence starts at the point of origin in
, and lasts for a period of
The termination time registered by the observer at F will be
which could be written as:
Quite interestingly, Equation (3a), is quite similar to the Doppler’s Formula derived for the frequency modulation of waves emitted from traveling bodies. Importantly, in both cases the direction of motion matters. In the Doppler Effect a wave emitted from a distancing body will be red-shifted (longer wavelength), whereas a wave emitted from an approaching body with be blues-shifted (shorter wavelength). The degree of red, or blue shift is an increasing function of the body’s velocity. The same applies to the time duration of an occurrence taking place at a stationary point on a moving frame. If the frame is distancing from F, the time measured at F will be dilated relative to the time measured at frame , whereas if the frame is approaching F, the time measured at F will contract.
It is important to note further that the above derived transformation applies to all carriers of information, including the commonly employed acoustic and optical communication media. For the case in which information is carried by light, with velocity c, or by electromagnetic waves with equal velocity, Equation (3a) becomes:
Evidently, the derived result does not agree with the time dilation prescribed by Special Relativity under the assumption of constancy of the velocity of light in vacuum. We prefer here to avoid the above mentioned inconsistency, by strictly limiting our theorizing to cases in which the information carrier wave propagates in velocities c < c0, where c0 is the velocity of light in vacuum. Putting such a limit does depreciate the value of our result, since it will still apply to all physical situations of interest.
2a. Length Transformation
To derive the distance transformation, assume that has on board a rod placed along its x’ axis between the points and , and that the observer in uses his clock to measure the length of the rod (in its rest frame) and communicates his measurement to the observer in F. Assume that the information carrier from frame to frame F travels with constant velocity (as measured in the source rest frame). To perform the measurement of the rod’s length, at , a signal is sent from the rare end of the rod, i.e., from to the observer at the point of origin . The length in (the rest frame) is calculated as:
is the time duration in the signal’s rest frame for its arrival to the observer in
. Using Equation (3a),
as a function of
can be expressed as
which could be rewritten as:
Because is departing F with velocity v, the signal will reach an observer in F at time t2 equaling
Substituting the value of from Equation (7a) in Equation (8a) yields:
which could be rewritten as:
Substituting the value of from Equation (5a), we get:
Thus, the observer in F will conclude that the length of the rod is equal to
Regardless of the value of , the above derived relativistic distance equation predicts distance contraction only when the two reference frames approach each other (i.e., for −1 < β ≤ 0). On the other hand, in contradiction of the famous Lorentz contraction, for distancing frames (i.e., 0 < β < 1) Equation (13a) predicts length extension.
3a. Mass Transformation
Let us assume that that the rod has a total rest-mass distributed uniformly along the x axis. According to Equation 13a an approaching rod will contract causing the mass density along the x axis to increase. On the other hand, a distancing rod will extend, causing its mass density along the x axis to dilute. The
body’s mass density in its rest-frame is , where A is the area of the body’s cross section, perpendicular to the direction of movement. In F the density is given by: , where l is the object’s length in F. Using the length transformation (Equation (13a)) we can write:
For the case in which information is carried by waves traveling at the velocity
of light we set . As could be seen from Equation (15a), the relativistic
mass density is inversely proportional to the relativistic length. It is predicted to increase for approaching bodies and a decrease for distancing bodies. For applications to cosmology, the unobservable (Dark) matter is defined as the difference between the Newtonian, and relativistic mass densities, or:
Figure 1 in the main text depicts the densities of observable and unobservable (dark) matter as functions of velocity. As could be seen in the figure, the theory predicts that the densities of observable and unobservable matter become equal
at velocity of recession equaling exactly . The ratio of dark matter to
matter densities, is given by:
4a. Energy Transformation
The matter energy density of a moving body with velocity v, and rest density ρ0 is given by:
where . For β → 0 (or ) Equation (18a) reduces to , which is the classical Newtonian expression.
Figure 1a depicts the relativistic matter energy density as a function of velocity β. The dashed line depicts the corresponding Newtonian relationship. For approaching bodies, the theory predicts an increase with β, up to infinity as β → −1. Strikingly, for distancing bodies, the matter energy density displays a non-monotonic behavior. It increases with β up to a maximum at velocity , and then decreases to zero at β = 1. The emerging type of non-monotonicity is quite surprising. No less surprising is the value of β, at which the matter energy density achieves its unique maximum. Differentiating Equation 18a with respect to β, and equating the result to zero yields:
which solves for:
where is the famous Golden Ratio [1a] [2a]. Substituting in Equation (18a) yields:
From Equation (19a) we can write: , which implies and . Substitution in Equation (21a) gives:
The results in Equations (20a) and (22a) are quite amazing, given the key role played by the Golden Ratio in nature, in nature, technology and the arts, including in the structure of plants, physics, the structure of the human brain, music, aesthetics, the social sciences, and more (see relevant references in the main text).
The energy carried by dark matter is given by:
The predicted dark matter energy density increases rapidly with velocity (see Figure 3 in the main text). At relatively low velocities, the bulk of the body’s energy is carried by its observable matter, while at high relativistic velocities, the bulk of the body’s energy is carried by its dark matter. The energy carried by matter, and the energy carried by dark matter are predicted to be equal precisely
at . The model predicts that at a receding body undertakes a phase transition, seizing to behave classically. The value of the matter energy density at this point reaches a peak equal to , which amounts to ≈ 0.09016994e0. The dark matter energy density at this critical point becomes equal to . These are aesthetically beautiful results, which could be put to direct experimental test.
Figure 1a. Matter energy density as a function of the recession velocity.
Suleiman, R. (2018) A Model of Dark Matter and Dark Energy Based on Relativizing Newton’s Physics. World Journal of Condensed Matter Physics, 8, 130-155. https://doi.org/10.4236/wjcmp.2018.83009
Relationship between Recession Velocity and Redshift
To derive the expression of redshift in its dependence on the recession velocity, consider an observer on earth who receives redshifted waves emitted from a receding celestial object (e.g., A star, galaxy center, etc.). Assume that the recession velocity of the celestial object at the time the light wave was emitted was equal to v. Using Doppler’s formula, we can write:
where ( ) is the wavelength (frequency) of the wave emitted by the object and ( ) is the wavelength (frequency) measured by the observer.
We also have and , where and are the time intervals corresponding to and , respectively. Substitution in Equation (1b) gives:
From Equation (1) in the main text we have: , where . Substitution in Equation (2b) yields:
And the recession velocity in terms of redshift is:
For blue-shift the same equation holds except that we must replace β by − β.