Dark gamma-ray bursts: possible role of multiphoton processes

TL;DR

This paper proposes that dark gamma-ray bursts may result from multiphoton frequency summation processes in young, thin plasma environments, explaining the lack of optical afterglow.

Contribution

It introduces a novel physical mechanism involving multiphoton processes to explain dark gamma-ray bursts, linking spectral features to plasma conditions.

Findings

Multiphoton frequency summation can shift spectra to higher energies.

Dark bursts may occur in young objects with thin plasma coatings.

The process is most probable shortly after explosive activity begins.

Abstract

The absence of optical afterglow at some gamma-ray bursts (so called dark bursts) requires analyses of physical features of this phenomenon. It is shown that such singularity can be connected with multiphoton processes of frequencies summation in the Rayleigh- Jeans part of spectra, their pumping into higher frequencies. It can be registered most probably on young objects with still thin plasma coating, without further thermalization, i.e. soon after a prompt beginning of the explosive activity.