Fossil Galaxy Groups - Ideal Laboratories for Studying the Effects of AGN Heating

被引：3

作者：

Jetha, Nazirah N. ^{[1
]}

Khosroshahi, Habib ^{[2
]}

Raychaudhury, Somak ^{[3
]}

Sengupta, Chandreyee ^{[4
]}

Hardcastle, Martin ^{[5
]}

机构：

[1] Univ Alabama, Dept Phys, Huntsville, AL 35899 USA

[2] Inst Res Fundment Sci IPM, Sch Astron, Tehran 19395, Iran

[3] Univ Birmingham, Sch Phys & Astron, Birmingham B15 2TT, W Midlands, England

[4] NCRA TIFER, Pune, Maharashtra, India

[5] Univ Hertfordshire, Hatfield AL10 9AB, Herts, England

来源：

MONSTER'S FIERY BREATH: FEEDBACK IN GALAXIES, GROUPS, AND CLUSTERS | 2009年 / 1201卷

关键词：

Galaxy groups; radio galaxies; X-ray; radio; X-RAY; COOLING FLOWS; CLUSTER; BUBBLES; HISTORY;

D O I：

10.1063/1.3293062

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present the first of a sample of fossil galaxy groups with pre-existing Chandra and/or XMM-Newton X-ray observations and new or forthcoming low frequency GMRT data - RXJ1416.4+2315 (z=0.137). Fossil galaxy groups are ideal laboratories for studying feedback mechanisms and how energy injection affects the IGM, since due to the lack of recent merging activity, we expect the TOM to be relatively pristine and affected only by any AGN activity that has occurred in the group. Our Chandra X-ray observations reveal features resembling AGN-inflated bubbles, whilst our GMRT radio data show evidence of extended emission from the central AGN that may be filling the bubble. This has enabled us to estimate the work done by the central AGN, place limits on the rates of energy injection and discuss the nature of the plasma filling the bubble.

引用

页码：305 / +

页数：2

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