Issue |
A&A
Volume 376, Number 3, September IV 2001
|
|
---|---|---|
Page(s) | L27 - L30 | |
Section | Letters | |
DOI | https://doi.org/10.1051/0004-6361:20010990 | |
Published online | 15 September 2001 |
Discovery of depressions in the X-ray emission of the distant galaxy cluster RBS797 in a CHANDRA observation
1
Astrophysics Research Institute, Liverpool John Moores University, Twelve Quays House, Birkenhead CH41 1LD, UK
2
Astrophysikalisches Institut Potsdam, An der Sternwarte 16, 14482 Potsdam, Germany
3
Universität Potsdam, Institut für Physik, Am Neuen Palais 10, 14469 Potsdam, Germany
Corresponding author: S. Schindler, sas@astro.livjm.ac.uk
Received:
14
May
2001
Accepted:
9
July
2001
We present CHANDRA observations of the X-ray luminous, distant
galaxy cluster RBS797 at . In the
central region the X-ray emission shows two pronounced X-ray
minima, which are located opposite to each other with respect to
the cluster centre. These depressions suggest an interaction
between the central radio galaxy and the intra-cluster medium, which
would be the first detection in such a distant cluster. The minima are
symmetric relative to the cluster centre
and very deep compared to similar features found in a few
other nearby clusters. A
spectral and morphological analysis of the overall cluster emission
shows that RBS797 is a hot cluster (
keV) with a total
mass of
.
Key words: galaxies: clusters: general / intergalactic medium / cosmology: observations / cosmology: theory / dark matter / X-rays: galaxies
© ESO, 2001
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