Particle acceleration at supernova shocks in young stellar clusters

TL;DR

This paper explores how supernova shocks in young stellar clusters accelerate particles, emphasizing magnetic field amplification and the potential for high-energy cosmic rays, with implications for understanding energetic particle origins.

Contribution

It introduces models of particle acceleration in star-forming regions, highlighting the role of magnetic field amplification via long-wavelength instabilities near supernova shocks.

Findings

Supernova shocks near stellar winds can boost cosmic ray energies.

Magnetic field amplification is driven by cosmic ray instabilities.

A significant fraction of supernova kinetic energy can convert into energetic particles.

Abstract

We briefly discuss models of energetic particle acceleration by supernova shock in active starforming regions at different stages of their evolution. Strong shocks may strongly amplify magnetic fields due to cosmic ray driven instabilities. We discuss the magnetic field amplification emphasizing the role of the long-wavelength instabilities. Supernova shock propagating in the vicinity of a powerful stellar wind in a young stellar cluster is argued to increase the maximal CR energies at a given evolution stage of supernova remnant (SNR) and can convert a sizeable fraction of the kinetic energy release into energetic particles.