Counter-Streaming Beams in Collisionless Pair Plasma Instability Systems II: Spectral Cone and Spectral Wave Mode Analysis

TL;DR

This paper analyzes the spectral characteristics of the Weibel instability in collisionless pair plasmas using particle-in-cell simulations, focusing on spectral cone and wave mode analysis to understand astrophysical plasma phenomena.

Contribution

It introduces a spectral analysis approach to study the Weibel instability, extending previous work with detailed spectral cone and wave mode analysis in collisionless plasmas.

Findings

Spectral power varies with viewing angle and frequency.

Identifies specific spectral cone features associated with instability.

Relates spectral trends to previous findings in the series.

Abstract

Energetic astrophysical phenomena, such as $\gamma$-ray bursts, supernova explosions, and magnetar flares occur in collisionless plasmas and involve various plasma kinetic and magnetohydrodynamic instabilities. In this paper, we explore the spectral trends of the Weibel instability using spectral analysis of particle-in-cell simulations. Power dependence on viewing angle and frequency are explored and the relation to the results of the first paper in this series is discussed.