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arXiv 0708.0585astro-ph
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来自斯隆数字巡天的13,240个星系团中的无线电AGN

Radio AGN in 13,240 galaxy clusters from the Sloan Digital Sky Survey

Steve Croft, Wim de Vries, Robert H. Becker

摘要:

本文将maxBCG星表中0.1 <= z <= 0.3的13,240个布里渊星系团星系核(BCGs)的位置与FIRST巡天的射电源相关联,研究了星系团中射电活动星系核的大小和分布。我们发现,19.7%的BCGs与FIRST源,这部分取决于恒星质量的BCG,并在较小程度上丰富的母集群(在这个意义上增加无线电响度与质量增加)。与BCGs相关的无线电发射的固有大小在55 kpc处达到峰值,尾部延伸到200 kpc。扩展源的射电功率将它们置于FR I和FR II型源之间的分界线上,而射电中紧凑的源往往不那么射电发光。我们还检测到与星团相关的过量射电源,而不是BCG本身,延伸到~1.4 Mpc。

英文摘要:

We correlate the positions of 13,240 Brightest Cluster Galaxies (BCGs) with 0.1 <= z <= 0.3 from the maxBCG catalog with radio sources from the FIRST survey to study the sizes and distributions of radio AGN in galaxy clusters. We find that 19.7% of our BCGs are associated with FIRST sources, and this fraction depends on the stellar mass of the BCG, and to a lesser extent on the richness of the parent cluster (in the sense of increasing radio loudness with increasing mass). The intrinsic size of the radio emission associated with the BCGs peaks at 55 kpc, with a tail extending to 200 kpc. The radio power of the extended sources places them on the divide between FR I and FR II type sources, while sources compact in the radio tend to be somewhat less radio-luminous. We also detect an excess of radio sources associated with the cluster, instead of with the BCG itself, extending out to ~1.4 Mpc.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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