Power-law cosmology, SN Ia, and BAO

Abstract

We revise observational constraints on the class of models of modified gravity which at low redshifts lead to a power-law cosmology. To this end we use available public data on Supernova Ia and on baryon acoustic oscillations. We show that the expansion regime $a(t)\sim t^{\beta }$ with $\beta$ close to 3/2 a spatially flat universe is a good fit to these data.

Replaced with the version accepted for publication in JCAP. Analysis of BAO was added

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• Cosmological acceleration
• Constraints on power law cosmology from cosmic chronometer, standard ruler, and standard candle data
• Phenomenological Dark Energy model with hybrid dynamic Cosmological Constant
• Cosmology In Terms Of The Deceleration Parameter. Part II
• NEC violation in $f(\bar{R},\bar{T})$ gravity in the context of a non-canonical theory via modified Raychaudhuri equation
• A comparison of cosmological models with high-redshift quasars
• Testing Linearly Coasting Cosmology by Strong Lensing System and Pantheon+ Data
• Stars older than the universe and possible mechanism of their creation