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

TL;DR

This paper compares simple power law cosmology with the standard $$CDM model using cosmic chronometer, standard ruler, and standard candle data, finding $$CDM generally fits better.

Contribution

It provides a direct observational comparison between power law cosmology and $$CDM using multiple data types.

Findings

$$CDM fits the data better than power law models.

Power law models are less consistent with combined observational data.

Standard $$CDM remains the preferred cosmological model based on current 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.