We present the K-band Hubble diagram for 162 brightest cluster galaxies(BCGs) in X-ray selected clusters, 0.01 <z<0.83. The sample incorporates that of Burke, Collins, & Mann (2000) and includes additional infrared data from the 2MASS extended source catalogue. We show that below z=0.1 the BCGs show no correlation with their environment, however, above z=0.1 BCGs in more X-ray luminous clusters are more uniform in their photometric properties. This suggests that there may be two populations of BCGs which have different evolutionary histories.
|Title of host publication||Tracing Cosmic Evolution with Galaxy Clusters|
|Place of Publication||San Francisco|
|Publisher||ASTRONOMICAL SOC PACIFIC|
|Publication status||Published - 2002|