A New Scenario on X-ray Shallow Decay of Gamma-ray Bursts

TL;DR

This paper proposes a microphysical process involving turbulent energy dissipation and stochastic acceleration to explain the shallow decay phase of early X-ray emission in gamma-ray bursts, aligning with Swift observations.

Contribution

It introduces a novel scenario emphasizing microphysical processes in the shocked region as the key to X-ray shallow decay in GRBs.

Findings

Early X-ray fluxes can be explained by the proposed microphysical process.

The scenario's predictions are consistent with Swift observational data.

Constraints on the evolution of microphysical parameters are established.

Abstract

In this Letter, we propose that a microphysical process takes a vital role in the shocked region in which the prompt emission of GRBs is emitted. The turbulent energy is included in the internal energy transferred by the kinetic energy of the shock. It dissipates through stochastic acceleration for the electrons to supply the early X-ray emission in the phase of shallow decay. We put the constraints on the time evolution of microphysical parameters. The early X-ray fluxes can be obtained by this scenario and these results are consistent with the Swift observation