Tsunamis in Galaxy Clusters: Heating of Cool Cores by Acoustic Waves

Tsunamis in Galaxy Clusters: Heating of Cool Cores by Acoustic Waves
复制标题

星系团中的海啸:声波加热冷核心

DOI:
10.1086/380113
复制
发表时间:
2003
期刊:
The Astrophysical Journal
影响因子:
--
通讯作者:
K. Wada
K. Wada
中科院分区:
--
文献类型:
--
作者:
Y. Fujita;T. Suzuki;K. Wada

文献摘要

被引文献

相似文献

使用的分析模型和数值模拟,我们表明,在集群内介质中的湍流运动产生的声波有效地加热所谓的冷却流集群的中心区域。我们假设湍流是由团簇或团簇合并中的子结构运动产生的。我们的分析模型可以重现观察到的几个集群的密度和温度分布。我们还表明,波可以传递更多的能量从一个集群的外部区域比单独的热传导。数值模拟一般支持分析研究的结果。
Using an analytical model and numerical simulations, we show that acoustic waves generated by turbulent motion in intracluster medium effectively heat the central region of a so-called cooling flow cluster. We assume that the turbulence is generated by substructure motion in a cluster or cluster mergers. Our analytical model can reproduce observed density and temperature profiles of a few clusters. We also show that waves can transfer more energy from the outer region of a cluster than thermal conduction alone. Numerical simulations generally support the results of the analytical study.