High energy emission from galaxy clusters and particle acceleration due to MHD turbulence

TL;DR

This paper models gamma-ray emission from galaxy clusters by examining how MHD turbulence accelerates particles, providing predictions for future gamma-ray observations to constrain models of relativistic particles in the intergalactic medium.

Contribution

It introduces a comprehensive model of non-thermal spectra in galaxy clusters considering MHD turbulence and relativistic particle interactions, aiding interpretation of upcoming gamma-ray data.

Findings

Predicted gamma-ray spectra for galaxy clusters.

Highlighting the role of MHD turbulence in particle acceleration.

Implications for future gamma-ray observations.

Abstract

In the next years the FERMI gamma ray telescope and the Cherenkov telescopes will put very stringent constraints to models of gamma ray emission from galaxy clusters providing crucial information on relativistic particles in the inter-galactic-medium. We derive the broad band non-thermal spectrum of galaxy clusters in the context of general calculations in which relativistic particles (protons and secondary electrons due to proton-proton collisions) interact with MHD turbulence generated in the cluster volume during cluster mergers, and discuss the importance of future gamma ray observations.