标题： 星系团中的射电源：径向分布以及1.4 GHz和K波段的双变量光度函数 显示英文标题

标题： Radio Sources in Galaxy Clusters: Radial Distribution, and 1.4 GHz and K-band Bivariate Luminosity Function

摘要： 我们对邻近星系团中射电源的几个基本特性进行了统计研究，包括星系团内的径向分布、射电光度函数（RLF）以及具有射电活动的星系比例（射电活动比例，RAF）。 分析是针对在X射线中检测到的573个星系团进行的，并且这些星系团也在NVSS中于1.4 GHz频率下被观测。 使用来自2MASS的K波段数据来识别最亮星系团星系（BCGs），并构建K波段光度函数。 我们的主要结果包括：（1） 射电明亮AGN的表面密度分布比所有星系更为集中，可以用浓度约为25的NFW分布来描述。 （2）将星系团中的RLF与场中的RLF进行比较显示，星系团中的AGN数密度大约高5,700倍，对应于星系在星系团中具有射电活动的概率比在场中高6.8倍。 我们认为，约40-50%的星系团中的射电明亮AGN可能位于低质量星系（M_K > -23）中。 （3）估计了不同恒星质量的星系团星系的RAF。 比特征光度（M_K < M_* ~ -24）更明亮的星系中，约有5%含有射电明亮AGN。 BCGs的RAF大于30%，并且依赖于星系团的质量。 与场天体相比，星系团星系的RAF高5-10倍。 结合AGN的RLF和星系团内的空间分布，我们估计它们可能在星系团中心附近向星系际介质注入约0.13 keV每粒子的能量。 我们还研究了星系团射电源对SZE星系团巡天结果的污染程度，并估计在150 GHz检测到的星系团中，多达10%可能包含射电通量与星系团SZE信号相当的AGN。 （摘要） 显示英文摘要

摘要： We present a statistical study of several fundamental properties of radio sources in nearby clusters, including the radial distribution within clusters, the radio luminosity function (RLF), and the fraction of galaxies that is radio-active (radio active fraction, RAF). The analysis is carried out for a sample of 573 clusters detected in the X-ray and also observed at 1.4 GHz in the NVSS. K-band data from the 2MASS are used to identify the brightest cluster galaxies (BCGs), and to construct the K-band LF. Our main results include: (1) The surface density profile of radio-loud AGNs is much more concentrated than that of all galaxies, and can be described by the NFW profile with concentration~25. (2) A comparison of the RLFs in the clusters and in the field shows that the cluster AGN number density is about 5,700 times higher, corresponding to a factor of 6.8 higher probability of a galaxy being radio active in the cluster than in the field. We suggest that about 40-50% of radio-loud AGNs in clusters may reside in low mass galaxies (M_K>-23). (3) The RAFs of cluster galaxies of different stellar mass are estimated. About 5% of galaxies more luminous than the characteristic luminosity (M_K<M_*~-24) host radio-loud AGNs. The RAF for BCGs is >30%, and depends on the cluster mass. Compare to the field population, cluster galaxies have 5-10 times higher RAF. Combining the AGN RLF and spatial distribution within clusters, we estimate that they may inject an energy of ~0.13 keV per particle to the intracluster medium near the cluster center. We also investigate the degree of contamination by cluster radio sources on the yields of SZE cluster surveys, and estimate that as many as 10% of clusters detected at 150 GHz may host AGNs whose flux is comparable to the cluster SZE signal. (abridged)