Features of the Acoustic Mechanism of Core-Collapse Supernova Explosions : Revisited using the Kinetic Approach

TL;DR

This paper revisits the acoustic mechanisms in core-collapse supernovae using a kinetic model to explore sound wave propagation and anomalous attenuation, providing insights into cosmic ray acceleration and vortex dynamics in astrophysical contexts.

Contribution

It introduces a discrete kinetic model to analyze sound wave behavior in rotating star systems, highlighting potential mechanisms for supernova explosion dynamics and cosmic ray acceleration.

Findings

Identification of anomalous (negative) attenuation or amplification of sound waves.

Insights into vortex-gas cascades and angular momentum balance in astrophysical turbulence.

Potential implications for cosmic ray acceleration mechanisms.

Abstract

The discrete kinetic model is used to study the propagation of sound waves in system of hard-disk-like rotating stars (or vortex gases). The anomalous (negative) attenuation or amplification which is possibly due to the binary collision of a dilute-enough rotating disk (or vortex-gas) system (each with opposite-sign rotating direction or angular momenta but the total (net) angular momenta or vorticity is zero) or microreversibility might arise from the implicit balance of the angular momentum during encounter and give clues to the understanding of possible acceleration of cosmic rays passing through this kind of channel and direct or inverse vortex-gas cascades in two-dimensional turbulence of astrophysical problems.