Brightest Cluster Galaxy Formation in Low-Redshift Galaxy Clusters

Details Brightest Cluster Galaxy Formation in Low-Redshift Galaxy Clusters Brightest Cluster Galaxy Formation in Low-Redshift Galaxy Clusters

2001-10-19

arxiv.org/abs/astro-ph/0110458v1

Astronomy and Astrophysics

Astrophysics

4 pages, 1 figure, Contribution to "Tracing Cosmic Evolution with Galaxy Clusters" (Sesto2001), ASP Conference Series

Scientific paper

We present the composite luminosity function of a sample of 17 low-redshift galaxy clusters. Our luminosity functions have been measured for an inner region ($r \leq r_{200}$) and an outer region ($r_{200} \leq r \leq 2r_{200}$) centred on each Brightest Cluster Galaxy. The inner region luminosity function has a significantly flatter faint-end slope ($\alpha_{inner}= -1.81 \pm 0.02$) than the outer region ($\alpha_{outer}= -2.07 \pm 0.02$). These results are consistent with the hypothesis that a large fraction of dwarf galaxies near cluster centres are being tidally disrupted.

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