Feedback in active galactic nucleus heating of galaxy clusters

被引：26
|
作者：
Hoeft, M [1 ]
Brüggen, M [1 ]
机构：
[1] Int Jacobs Univ Bremen, D-28759 Bremen, Germany
来源：
ASTROPHYSICAL JOURNAL | 2004年 / 617卷 / 02期
关键词：
cooling flows; galaxies : active; galaxies : clusters : general; X-rays : galaxies : clusters;
D O I：
10.1086/425411
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
One of the challenges that models of active galactic nucleus (AGN) heating of the intracluster medium (ICM) face is to explain how the mechanical luminosity of the AGN is tuned to the radiative losses of the ICM. Here we implement a simple one-dimensional model of a feedback mechanism that links the luminosity of the AGN to the accretion rate. We demonstrate how this simple feedback mechanism leads to a quasi - steady state for a broad range of parameters. Moreover, within this feedback model, we investigate the effect of thermal conduction and find that its relative importance depends strongly on the cluster mass.
引用
收藏
页码：896 / 902
页数：7
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