期刊
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
卷 364, 期 4, 页码 1354-1362出版社
BLACKWELL PUBLISHING
DOI: 10.1111/j.1365-2966.2005.09679.x
关键词
Galaxies : clusters : general; galaxies : elliptical and lenticular; cD; galaxies; evolution; galaxies : formation
We measure the Petrosian structural properties of 33 brightest cluster galaxies (BCGs) at redshifts z <= 0.1 in X-ray selected clusters with a wide range of X-ray luminosities. We find that some BCGs show distinct signatures in their Petrosian profiles, likely to be due to cD haloes. We also find that BCGs in high X-ray luminosity clusters have shallower surface brightness profiles than those in low X-ray luminosity clusters. This suggests that the BCGs in high X-ray luminosity clusters have undergone up to twice as many equal-mass mergers in their past as those in low X-ray luminosity clusters. This is qualitatively consistent with the predictions of hierarchical structure formation.
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