Constraints on power law cosmology from cosmic chronometer, standard ruler, and standard candle data

Abstract

In this paper I investigate how well simple power law expansion fits observational data in comparison to the standard $\Lambda$CDM model. I analyze a data set consisting of cosmic chronometer, standard ruler, and standard candle measurements, finding that the $\Lambda$CDM model provides a better fit to most combinations of these data than the power law ansatz.

Comments: 18 pages, 2 figures. The previous version of this paper was rejected by Phys. Rev. D; this version has been accepted for publication in JCAP after some minor editorial changes