RADIO SOURCE FEEDBACK IN GALAXY EVOLUTION

RADIO SOURCE FEEDBACK IN GALAXY EVOLUTION
复制标题

星系演化中的无线电源反馈

DOI:
10.1088/0004-637x/699/1/525
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发表时间:
2009
期刊:
The Astrophysical Journal
影响因子:
--
通讯作者:
P. Alexander
P. Alexander
中科院分区:
--
文献类型:
--
作者:
S. Shabala;P. Alexander

文献摘要

被引文献

相似文献

我们提出了一个星系演化模型,其中包括一个物理动机的实施活动星系核反馈。间歇性的喷射使无线电等离子体的茧膨胀,然后以超音速膨胀,冲击加热周围的气体。该模型再现观察到的星星形成历史的最高红移可靠的数据存在,以及观察到的星系颜色双峰。间歇性的射电源反馈也自然地提供了一种保持黑洞和球体同步增长的方法。我们发现了一个头重脚轻的初始质量函数z > 2的可能的证据,与观测的元素丰度,亚毫米和莱曼打破星系计数一致。
We present a galaxy evolution model which incorporates a physically motivated implementation of active galactic nucleus feedback. Intermittent jets inflate cocoons of radio plasma which then expand supersonically, shock heating the ambient gas. The model reproduces observed star formation histories to the highest redshifts for which reliable data exist, as well as the observed galaxy color bimodality. Intermittent radio source feedback also naturally provides a way of keeping the black hole and spheroid growth in step. We find possible evidence for a top-heavy initial mass function for z > 2, consistent with observations of element abundances, and submillimeter and Lyman break galaxy counts.