Hostname: page-component-78c5997874-v9fdk Total loading time: 0 Render date: 2024-11-19T04:21:57.810Z Has data issue: false hasContentIssue false
  • English
  • Français

Searching for radio relics and halos. Their role in the formation and acceleration of extragalactic cosmic rays

Published online by Cambridge University Press:  20 June 2011

Nectaria A. B. Gizani
Nectaria A. B. Gizani*
Affiliation:
School of Natural Sciences and Technology, Hellenic Open University, Tsamadou 13-15 & Ag. Andreou, 26222 Patra, Greece email: [email protected]
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.

We search for extended regions of radio emission not associated with Active Galactic Nuclei, known as ‘relics’, ‘halos’ and ‘mini halos’, in a sample of 70 Abell clusters for which we have radio, optical and X-ray data. AGN can produce particle bubbles of non-thermal emission, which can restrict cosmic rays. Hence, radio relics and (mini) halos could be forming as a result of the confinement of cosmic rays by these bubbles. We are probing the role that intracluster magnetic fields (using Faraday rotation measure and inverse compton arguments), mergers (through radio/X-ray interactions), cooling flows (X-ray data), radio jets/shocks, as well as radio (mini) halos/relics, play in the formation, acceleration, and propagation of cosmic rays. For the current study, we have selected two powerful nearby radio galaxies from our sample: Hercules A and 3C 388. We report on the work in progress and future plans.

Keywords

galaxies: activegalaxies: clusters: individual (Hercules A, 3C 388)galaxies: magnetic fieldsradio continuum: galaxies(ISM:) cosmic raysX-rays: galaxies: clusters
Type
Addendum
Information
Proceedings of the International Astronomical Union , Volume 6 , Symposium S275: Jets at all Scales , September 2010 , E3
Copyright
Copyright © International Astronomical Union 2011

References

Dermer, C. D., Razzaque, S., Finke, J. D., & Atoyan, A. 2009, New J. Phys., 11, 065016CrossRefGoogle Scholar
Enβlin, Torsten A. et al. . 1997, ApJ, 477, 560Google Scholar
Ferrari, C., Govoni, F., Scxhindler, S., Bykov, A. M., & Rephaeli, Y. 1992, in: Kaastra, J. S. (ed.), Space Science Reviews, [astro-ph/0801.0985v1]Google Scholar
Gizani, Nectaria A. B. & Leahy, J. P. 2003, MNRAS, 342, 399CrossRefGoogle Scholar
Gizani, Nectaria A. B. & Leahy, J. P. 2004, MNRAS, 350, 865CrossRefGoogle Scholar
Hardcastle, M. J. 2010, MNRAS, 405, Issue 4, 2810Google Scholar
Leahy, J. P. & Gizani, Nectaria A. B. 2002, NewAR, 46, 117CrossRefGoogle Scholar
Leahy, J. P. & Gizani, Nectaria A. B. 2001, ApJ, 555, 709CrossRefGoogle Scholar
West, M. J. 1994, MNRAS, 268, 79CrossRefGoogle Scholar