Are Type Ia supernova powerful tool to detect anisotropic expansion of the Universe?

Abstract

In this paper, we present a detailed analysis of the dark energy dipole using Union2, Pantheon and GRB dataset in Chameleon and Teleparallel dark energy models, in comparison with $$\Lambda $$ΛCDM. Both models are extensively studied in recent years and our result shows that with Union2 and Pantheon data, the preferred direction of the anisotropy in both models are very close to each other as well as with those obtained in some studies for $$\Lambda $$ΛCDM. However, when the models fitted with a combination of Union 2 and GRB, the statistical analysis slightly favors the Chameleon cosmology over Teleparallel gravity, with the maximum anisotropic direction of $$(l = 330^{+30}_{-28}$$(l=330-28+30, $$b = -15^{+23}_{-25})$$b=-15-25+23) in galactic coordinate system, comparable with $$\alpha $$α-dipole result in Keck-VLT data and LCDM.

Cosmology and the massive photon frequency shift in the Standard-Model Extension

“…This is maybe due to our location in a local void, or other manifestations of inhomogeneities or anisotropies. But before embarking in this sort of argument, the controversy on the data supporting dark energy [44][45][46][47][48][49][50][51][52][53][54][55][56][57]75] should be first of all settled.…”

“…The LSV shift provides a physical explanation of red shift remapping [91][92][93][94] and is not limited to the SNIa case. It is naturally suited to explaining recently discovered expansion anisotropies [55][56][57]95].…”

“…Another school of thought addresses alternatives to dark energy, of which we mention a few: photons oscillating into axions to produce a dimming effect for SNeIa [49,50], the different spectrum of primordial fluctuations generated by inflation [51], timescape cosmology and the inhomogeneous universe [52], SNIa luminosity depending on red shift [53,54], stronger evidence of acceleration dipole approximately aligned with the CMB dipole than evidence of a monopole dark energy acceleration [55,56].…”

Investigating dark energy by electromagnetic frequency shifts

“…The z S shift provides a physical explanation of red shift remapping [112][113][114][115] and is not limited to the SN Ia case. It is naturally suited to explaining recently discovered expansion anisotropies [116][117][118][119].…”

Cosmology and the massive photon frequency shift in the Standard-Model Extension

“…Another school of thought addresses alternatives to dark energy, of which we mention a few: photons oscillating into axions to produce a dimming effect for SNeIa [49,50], the different spectrum of primordial fluctuations generated by inflation [51], timescape cosmology and the inhomogeneous Universe [52], SNIa luminosity depending on red shift [53,54], stronger evidence of acceleration dipole approximately aligned with the CMB dipole than evidence of a monopole dark energy acceleration [55,56].…”