XMM observation of the dynamically young galaxy cluster CL 0939+4713

被引：19

作者：

De Filippis, E ^{[1
]}

Schindler, S

Castillo-Morales, A

机构：

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

[2] MIT, Ctr Space Res, Cambridge, MA 02139 USA

[3] Univ Innsbruck, Inst Astrophys, A-6020 Innsbruck, Austria

[4] Univ Granada, Dept Fis Teor & Cosmos, Granada 18002, Spain

来源：

ASTRONOMY & ASTROPHYSICS | 2003年 / 404卷 / 01期

关键词：

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

D O I：

10.1051/0004-6361:20030481

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present an XMM observation of the distant galaxy cluster CL 0939+4713. The X-ray image shows pronounced substructure, with two main subclusters which have even some internal structure. This is an indication that the cluster is a dynamically young system. This conclusion is supported by the temperature distribution: a hot region is found between the two main subclusters indicating that they are at the beginning of a major merger, and that they will probably collide in a few hundreds of Myr. The intra-cluster gas of CL 0939+4713 shows inhomogeneities in the metal distribution, with the optically richer subcluster having a higher metallicity.

引用

页码：63 / 74

页数：12

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