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Particle acceleration in galaxy clusters via MHD turbulence

โœ Scribed by G. Brunetti

Publisher
John Wiley and Sons
Year
2006
Tongue
English
Weight
140 KB
Volume
327
Category
Article
ISSN
0004-6337

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โœฆ Synopsis

Abstract

Synchrotron emission extended on Mpc scales is detected in a number of massive galaxy clusters. The hot ICM becomes a collisionlessโ€“turbulent plasma on scales below 10โ€“50 kpc and thus turbulence may accelerate the relativistic particles radiating in these sources. In this paper the injection, cascading and dissipation of hydro and MHD turbulence in galaxy clusters are briefly discussed. We also discuss the two most relevant mechanisms for stochastic particle acceleration produced by MHD turbulence in galaxy clusters, namely Alfvรฉnic acceleration and Transit Time Damping acceleration from fast modes. (ยฉ 2006 WILEYโ€VCH Verlag GmbH & Co. KGaA, Weinheim)

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