A possible shock wave in the intergalactic medium of the cluster of galaxies A754

被引：19

作者：

Krivonos, RA

Vikhlinin, AA

Markevitch, ML

Pavlinsky, MN

机构：

[1] Russian Acad Sci, Space Res Inst, Moscow 117810, Russia

[2] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA

来源：

ASTRONOMY LETTERS-A JOURNAL OF ASTRONOMY AND SPACE ASTROPHYSICS | 2003年 / 29卷 / 07期

基金：

俄罗斯基础研究基金会;

关键词：

clusters of galaxies; shock waves;

D O I：

10.1134/1.1589859

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

observations show the nonequilibrium state of the central part of the cluster, in which a cloud of cold plasma similar to500 kpc in size was identified amid the hotter cluster gas. The X-ray image of A754 exhibits a brightness discontinuity, which can be interpreted as a shock wave in front of a moving cloud of dense gas. The shock parameters are determined from the jump in intergalactic gas density using the ROSAT image. The estimated Mach number is M-1 = 1.71(-0.24)(+0.45) at a 68% confidence level. (C) 2003 MAIK "Nauka/Interperiodica". kalInterperiodica".

引用

页码：425 / 428

页数：4

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