GRB prompt phase spectra under backscattering dominated model

TL;DR

This paper introduces a backscattering dominated model for GRB prompt emission, explaining spectral features through pair annihilation photons backscattered by an outflowing stellar cork, aligning with observed spectral properties.

Contribution

It presents a novel backscattering model for GRB prompt spectra, emphasizing pair annihilation and Compton scattering processes in the outflowing environment.

Findings

Spectra can explain observed low and high energy slopes.

Model reproduces distribution of spectral peak energies.

Spectral features match observational data.

Abstract

We propose a backscattering dominated prompt emission model for gamma-ray bursts (GRB) prompt phase in which the photons generated through pair annihilation at the centre of the burst are backscattered through Compton scattering by an outflowing stellar cork. We show that the obtained spectra are capable of explaining the low and high energy slopes as well as the distribution of spectral peak energies in their observed prompt spectra.