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Environmental Dependence of the Structure of Brightest Cluster Galaxies | | S. Brough
; C. Collins
; D. Burke
; P. Lynam
; R. Mann
; | | Date: |
4 Oct 2005 | | Subject: | astro-ph | | Affiliation: | 1,2), C. Collins , D. Burke , P. Lynam , R. Mann ( Liverpool John Moores University, Swinburne University, Center for Astrophysics, ESO, Institute for Astronomy, University of Edinburgh | | Abstract: | 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. | | Source: | arXiv, astro-ph/0510065 | | Services: | Forum | Review | PDF | Favorites | |
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