SIMBAD references

1995A&A...300..711A - Astronomy and Astrophysics, volume 300, 711-721 (1995/8-3)

Multicolor surface photometry of brightest cluster galaxies. II. Enlarging the sample and improving the analysis.


Abstract (from CDS):

Intrinsic color profiles of a sample of nine Brightest Cluster Galaxies (BCGs) are recovered from the observed color profiles by evaluating spurious gradients introduced by errors in the determination of the sky levels and by different seeing conditions between the observations. Isophote shapes and surface brightness profiles are presented for the four newly observed BCGs. Three out of nine BCGs show color gradients of the order of 0.10mag per decade in radius. Five BCGs do not possess any color gradient larger than 0.01mag per decade in radius. We do not see any correlation between the presence (or the sign) of a color gradient and the BCG morphology (slope and shape of its surface brightness profile), or the cluster richness. This argues against a strong and recent influence of the environment on the BCG morphology. The slope of the BCG surface brightness profile is correlated to the cluster richness, posing a constraint on the initial conditions, or on the physical mechanism that is responsible for the present BCG morphology. Finally, only one BCG can be a cD despite visual classification as such of all studied BCGs.

Abstract Copyright:

Journal keyword(s): galaxies: elliptical and lenticular, cD - galaxies: fundamental parameters - galaxies: cluster of - photometry

CDS comments: Sequences F284-9 and F762-8 not in SIMBAD

Simbad objects: 25

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