Does Amati Relation Depend on Luminosity of GRB's Host Galaxies?

TL;DR

This study investigates whether the Amati relation for gamma-ray bursts depends on the luminosity of their host galaxies and finds no significant dependence or evolution with environment metallicity.

Contribution

It provides the first systematic test of the Amati relation's dependence on host galaxy luminosity and metallicity, showing consistency across different environments.

Findings

Amati relation is consistent across host galaxy luminosity groups.

No strong evolution of the Amati relation with metallicity.

Supports the universality of the Amati relation.

Abstract

In order to test systematic of the Amati relation, the 24 long-duration GRBs with firmly determined $E_{\gamma,\mathrm{iso}}$ and $E_{\mathrm p}$ are separated into two sub-groups according to B-band luminosity of their host galaxies. The Amati relations in the two subgroups are found to be in agreement with each other within uncertainties. Taking into account of the well established luminosity - metallicity relation of galaxies, no strong evolution of the Amati relation with GRB's environment metallicity is implied in this study.