Testing the standardizability of, and deriving cosmological constraints from, a new Amati-correlated gamma-ray burst data compilation

TL;DR

This study demonstrates that an updated gamma-ray burst dataset can be standardized using the Amati correlation for cosmological analysis, but its constraints are in tension with established methods, limiting combined use.

Contribution

The paper introduces an updated 220 GRB dataset standardized via the Amati correlation and evaluates its compatibility with other cosmological data.

Findings

GRB data are standardizable through the Amati correlation.

Constraints from GRB data show >2σ tension with $H(z)$ and BAO data.

GRB data cannot be jointly used with $H(z)$ + BAO for cosmological constraints.

Abstract

By using gamma-ray burst (GRB) data to simultaneously constrain Amati correlation parameters and cosmological parameters in six spatially-flat and nonflat dark energy cosmological models, we show that an updated 220 GRB version of the Jia et al. [Mon. Not. R. Astron. Soc. 516, 2575 (2022)] GRB data compilation are standardizable through the Amati correlation and so can be used for cosmological analyses. However, the resulting GRB data constraints on the current value of the nonrelativistic matter density parameter, $\Omega_{m0}$, are in $>2\sigma$ tension with those from a joint analysis of better-established Hubble parameter [$H(z)$] and baryon acoustic oscillation (BAO) data for most of the cosmological models we consider, indicating that these GRB data cannot be jointly used with better-established $H(z)$ + BAO data to constrain cosmological parameters.