GRB spectral parameter modeling

TL;DR

This paper models gamma-ray burst spectra using Diffusive Synchrotron Radiation (DSR) in strong random magnetic fields, showing consistency with observed spectral parameters and their correlations.

Contribution

It introduces a detailed modeling approach of GRB spectra based on DSR in strong random magnetic fields, providing a new explanation for observed spectral features.

Findings

DSR in strong random magnetic fields matches observed GRB spectral distributions.

The model explains correlations between spectral parameters.

Non-perturbative DSR is a viable emission mechanism for GRBs.

Abstract

Fireball model of the gamma-ray bursts (GRBs) predicts generation of numerous internal shocks, which efficiently accelerate charged particles and generate relatively small-scale stochastic magnetic and electric fields. The accelerated particles diffuse in space due to interaction with the random waves and so emit so called Diffusive Synchrotron Radiation (DSR) in contrast to standard synchrotron radiation they would produce in a large-scale regular magnetic fields. In this contribution we present key results of detailed modeling of the GRB spectral parameters, which demonstrate that the non-perturbative DSR emission mechanism in a strong random magnetic field is consistent with observed distributions of the Band parameters and also with cross-correlations between them.