Testing CCC+TL Cosmology with Observed Baryon Acoustic Oscillation Features

Abstract

The primary purpose of this paper is to see how well a recently proposed new model fits (a) the position of the baryon acoustic oscillation (BAO) features observed in the large-scale distribution of galaxies and (b) the angular size measured for the sound horizon due to BAO imprinted in the cosmic microwave background (CMB) anisotropy. The new model is a hybrid model that combines the tired light (TL) theory with a variant of the ΛCDM model in which the cosmological constant is replaced with a covarying coupling constants’ (CCC) parameter α. This model, dubbed the CCC+TL model, can fit the Type Ia supernovae Pantheon+ data as accurately as the ΛCDM model, and also fit the angular size of cosmic dawn galaxies observed by the James Webb Space Telescope, which is in tension with the ΛCDM model. The results we obtained are 151.0 (±5.1) Mpc for the absolute BAO scale at the current epoch, and the angular size of the sound horizon θ sh = 0.°60, matching Planck’s observations at the surface of the last scattering when the baryon density is set to 100% of the matter density and ∣α∣ is increased by 5.6%. It remains to be seen if the new model is consistent with the CMB power spectrum, the Big Bang nucleosynthesis of light elements, and other critical observations.

Constraints on the Minimally Extended Varying Speed of Light Model Using Pantheon+ Dataset

“…There are also interesting papers that have interpreted these results [82,83]. The so-called CCC (covarying coupling constants) + TL (tired light) cosmology obtains Ω m0 = 0 using the baryonic acoustic oscillation data [82]. One can find the origin of dark matter and dark energy as a time-dependent conformal scale factor in the Scale Invariant Vacuum (SIV) paradigm [83].…”

“…Among the CPL models, there are cases where the dark matter density is zero. There are also interesting papers that have interpreted these results [82,83]. The so-called CCC (covarying coupling constants) + TL (tired light) cosmology obtains Ω m0 = 0 using the baryonic acoustic oscillation data [82].…”

The Scale-Invariant Vacuum Paradigm: Main Results and Current Progress Review (Part II)

“…For a more modern treatment of the scale-invariant gravity idea, see [22], which is based on Cartan's formalism and along the more traditional scalar field approach, which, due to its abstractness, seems to have stayed disconnected from observational tests, apart from a few papers on the model parameters for conformal cosmology [23,24] where dark matter and energy seem to be replaced by the concept of rigid matter, which is still observationally questionable as its dark counterparts. Other unreasonable ideas are related to tired light or varying speed of light considerations [25,26], which seem to be relevant to the general Weyl mathematically framework, but do not account for the current view for defining the International System of Units [27]. Here, our approach is more traditional, physically motivated and with as little general abstraction as possible.…”

The Nature of Light and of Wave-Particle Duality

“…That is, twice as much as the previously accepted date. In addition, the very fact of the existence of Dark Matter is called into question, which was recently expressed by Canadian scientists [7].…”