Hostname: page-component-78c5997874-94fs2 Total loading time: 0 Render date: 2024-11-05T14:12:42.729Z Has data issue: false hasContentIssue false
  • English
  • Français

Stochastic re-acceleration in the ICM

Published online by Cambridge University Press:  01 August 2006

Gianfranco Brunetti  and
Alex Lazarian
Gianfranco Brunetti
Affiliation:
INAF – Istituto di Radioastronomia, via P. Gobetti 101, I–40129, Bologna, Italy
Alex Lazarian
Affiliation:
Astronomy Dep., Univ. of Wisconsin, 475 North Charter Street, Madison, WI 53706, USA
Rights & Permissions [Opens in a new window]

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

Here we suggest that efficient stochastic particle re–acceleration in galaxy clusters may be driven by compressible modes. The damping of these modes is severely dominated by the TTD–resonance with thermal electrons and protons in the ICM. However, a small energy flux of these modes may be channelled into particle re-acceleration and this gives re-acceleration times of the order of ∼ 108 yrs, sufficient to mantain GeV radiating electrons in the ICM.

Keywords

acceleration of particlesturbulencegalaxies: clusters: general
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 2 , Highlights of Astronomy 14: Highlights of Astronomy , August 2006 , pp. 97
Copyright
Copyright © International Astronomical Union 2007

References

Blasi, P. 2004, J. Korean Astron. Soc., 37, 483Google Scholar
Brunetti, G. 2004, J. Korean Astron. Soc., 37, 493Google Scholar
Brunetti, G., Blasi, P., Cassano, R., & Gabici, S. 2004, MNRAS, 350, 1174Google Scholar
Brunetti, G., & Blasi, P. 2005, MNRAS, 363, 1173CrossRefGoogle Scholar
Feretti, L. 2005, Adv. Sp. Res., 36, 729Google Scholar
Lazarian, A., & Beresnyak, A. 2006, MNRAS, 373, 1195CrossRefGoogle Scholar
Sarazin, C. 2004, J. Korean Astron. Soc., 37, 433CrossRefGoogle Scholar
Yan, H., & Lazarian, A. 2004, ApJ, 614, 757CrossRefGoogle Scholar