Other
Scientific paper
Dec 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aas...20918305v&link_type=abstract
2007 AAS/AAPT Joint Meeting, American Astronomical Society Meeting 209, #183.05; Bulletin of the American Astronomical Society,
Other
Scientific paper
Using a sample of 625 brightest cluster galaxies (BCGs) in the Sloan Digital Sky Survey (SDSS) at redshifts z<0.1, we attempt to disentangle the roles of their typically large stellar masses and their location in the center of a cluster in determining their properties.
The basis of our cluster catalog is the C4 catalog, but we refine this catalog by placing particular emphasis on correctly identifying the BCG, and determining accurate velocity dispersions for the clusters.
We find that BCGs are more likely to host radio--loud active galactic nuclei than other galaxies of the same mass.
Concerning their structural parameters, we find that BCGs are larger and have higher velocity dispersions than non-BCGs of the same stellar mass. Combined, these findings indicate a higher dark matter fractions in BCGs, attributable to the dark matter halo of the parent cluster. This higher dark matter fraction is less variable with luminous mass than for non-BCGs, which causes early-type BCGs to lie on a different fundamental plane than ordinary early-type galaxies. BCGs also follow a steeper Faber--Jackson relation than non-BCGs, and we find tentative evidence that the steepening is stronger in more massive clusters.
Best Philip N.
der Linden Anja von
Kauffmann Guinevere
White Steven D.
No associations
LandOfFree
How Special are Brightest Cluster Galaxies? does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with How Special are Brightest Cluster Galaxies?, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and How Special are Brightest Cluster Galaxies? will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1163166