Are X-ray clusters cooled by heat conduction to the surrounding intergalactic medium?

被引：29

作者：

Loeb, A ^{[1
]}

机构：

[1] Harvard Univ, Dept Astron, Cambridge, MA 02138 USA

来源：

NEW ASTRONOMY | 2002年 / 7卷 / 06期

基金：

美国国家航空航天局; 美国国家科学基金会;

关键词：

galaxies : clusters : general; cooling flows; conduction; hydrodynamics;

D O I：

10.1016/S1384-1076(02)00140-9

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We show that X-ray clusters would have cooled substantially over a Hubble time by transport of heat from their hot interior to the their envelope, if the heat conductivity had not been heavily suppressed relative to the Spitzer value due to magnetic fields. The suppression is required in order for the observed abundance of hot X-ray clusters to be consistent with predictions from popular cosmological models. If a similar or stronger suppression factor applies to cluster cores, then thermal conduction cannot be the mechanism that prevents cooling flows there. (C) 2002 Elsevier Science BV All rights reserved.

引用

收藏

页码：279 / 282

页数：4

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