Discovery of depressions in the X-ray emission of the distant galaxy cluster RBS797 in a CHANDRA observation

被引：49

作者：

Schindler, S

Castillo-Morales, A

De Filippis, E

Schwope, A

Wambsganss, J

机构：

[1] Liverpool John Moores Univ, Astrophys Res Inst, Birkenhead CH41 1LD, Merseyside, England

[2] Astrophys Inst Potsdam, D-14482 Potsdam, Germany

[3] Univ Potsdam, Inst Phys, D-14469 Potsdam, Germany

来源：

ASTRONOMY & ASTROPHYSICS | 2001年 / 376卷 / 03期

关键词：

galaxies : clusters : general; intergalactic medium; cosmology : observations; cosmology : theory; dark matter; X-rays : galaxies;

D O I：

10.1051/0004-6361:20010990

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present CHANDRA observations of the X-ray luminous, distant galaxy cluster RBS797 at z = 0.35. 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 (T = 7.7(-1.0)(+1.2) keV) with a total mass of M-tot(r(500)) = 6.5(-1.2)(+1.6) x 10(14) M-..

引用

页码：L27 / L30

页数：4

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