Gamma Rays Bursts: A Viable Cosmological Probe?

Abstract

In this work, our focus is on exploring the potential of current GRB measurements to provide reliable constraints on cosmological model parameters at high redshift. This work is divided into two parts. First, we calibrate the Amati relation in a model-independent way by using Hubble parameter measurements obtained from the differential ages of the galaxies. We further check if the Amati relation parameters evolve with the GRBs' redshift or not, using the data of Old Astrophysical Objects. The results indicate that GRBs do seem to evolve with redshift. In the second part, we test different cosmological models with the calibrated GRB data obtained by using constant and dynamical Amati relation. Our results indicate that the present quality of GRB data is not good enough to put tight constraints on the cosmological parameters. Hence we perform a joint analysis with the combined data of GRBs and Type Ia Supernovae (SNe) and find that this can considerably enhance cosmological constraints in contrast to solely relying on GRBs.

35 Pages, 14 Figures, 13 Tables. Accepted for publication in JCAP

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Cited by in corpus (10)

• Deep Neural Networks for Estimation of Gamma-Ray Burst Redshifts
• Testing the standardizability of, and deriving cosmological constraints from, a new Amati-correlated gamma-ray burst data compilation
• Joint Analysis of Constraints on f(R) Parametrization from Recent Cosmological Observations
• Review on the minimally extended varying speed of light model
• Does the Redshift Distribution of Swift Long GRBs Trace the Star-Formation Rate?
• Constraints on Cosmological Models with Gamma-Ray Bursts in Cosmology-Independent Way
• Testing the consistency of new Amati-correlated gamma-ray burst dataset cosmological constraints with those from better-established cosmological data
• Gamma-Ray Bursts Calibrated by Using Artificial Neural Networks from the Pantheon+ Sample
• Do the Amati and Yonetoku Relations Evolve with Redshift for Swift GRBs?
• A test of Amati relation using HII galaxy distances