期刊
ASTROPHYSICAL JOURNAL
卷 667, 期 1, 页码 L13-L16出版社
IOP PUBLISHING LTD
DOI: 10.1086/522086
关键词
galaxies : active; galaxies : clusters: general
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 AGNs 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 similar to 1.4 Mpc.
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