Thermal conduction in clusters of galaxies

被引：390

作者：

Narayan, R

Medvedev, MV

机构：

[1] Inst Adv Study, Princeton, NJ 08540 USA

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

[3] Univ Toronto, Canadian Inst Theoret Astrophys, Toronto, ON M5S 3H8, Canada

来源：

ASTROPHYSICAL JOURNAL | 2001年 / 562卷 / 02期

关键词：

conduction; cooling flows; galaxies : clusters : general; magnetic fields;

D O I：

10.1086/338325

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We estimate the thermal conductivity of a weakly collisional magnetized plasma with chaotic magnetic field fluctuations. When the fluctuation spectrum extends over two or more decades in wavevector, we find that thermal conduction is very efficient; the conduction coefficient is only a factor of similar to5 below the classical Spitzer estimate. We suggest that conduction could play a significant role in cooling flows in clusters of galaxies.

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收藏

页码：L129 / L132

页数：4

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