| Issue |
A&A
Volume 384, Number 3, March IV 2002
|
|
|---|---|---|
| Page(s) | L27 - L30 | |
| Section | Letters | |
| DOI | https://doi.org/10.1051/0004-6361:20020207 | |
| Published online | 15 March 2002 | |
Letter to the Editor
Radio and X-ray detectability of buoyant radio plasma bubbles in clusters of galaxies
Max-Planck-Institut für Astrophysik, Karl-Schwarzschild-Str. 1, Postfach 1317, 85741 Garching, Germany
Corresponding author: T. A. Enßlin, ensslin@mpa-garching.mpg.de
Received:
18
January
2002
Accepted:
5
February
2002
The Chandra X-ray Observatory is finding a surprisingly large number of cavities in the X-ray emitting intracluster medium (ICM), produced by the release of radio plasma from active galactic nuclei. In this letter, we present simple analytic formulae for the evolution of the X-ray deficit and for the radio spectrum of a buoyantly rising bubble. The aim of this work is to provide a theoretical framework for the planning and the analysis of X-ray and radio observations of galaxy clusters. We show that the cluster volume tested for the presence of cavities by X-ray observations is a strongly rising function of the sensitivity.
Key words: radiation mechanisms: thermal / radiation mechanism: non-thermal / galaxies: active / intergalactic medium / galaxies: cluster: general / radio continuum: general
© ESO, 2002
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