Radiation from Comoving Poynting Flux Acceleration

TL;DR

This paper derives analytic formulas for radiation from electrons accelerated by relativistic comoving Poynting flux, validated with simulations, and discusses astrophysical applications including gamma-ray bursts.

Contribution

It provides new analytic formulas for radiation power and spectrum from electrons in relativistic Poynting flux acceleration, supported by simulation validation.

Findings

Analytic formulas for radiation power output derived.

Critical frequency of radiation spectrum obtained.

Application to gamma-ray burst models discussed.

Abstract

We derive analytic formulas for the radiation power output when electrons are accelerated by a relativistic comoving kinetic Poynting flux, and validate these analytic results with Particle-In-Cell simulations. We also derive analytically the critical frequency of the radiation spectrum. Potential astrophysical applications of these results are discussed. A quantitative model of gamma-ray bursts based on the breakout of kinetic Poynting flux is presented.