Brightest Cluster Galaxy Profile Shapes

Details Brightest Cluster Galaxy Profile Shapes Brightest Cluster Galaxy Profile Shapes

May 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996aas...188.1102g&link_type=abstract

American Astronomical Society, 188th AAS Meeting, #11.02; Bulletin of the American Astronomical Society, Vol. 28, p.839

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Scientific paper

We model the surface brightness profiles of an observed sample of 119 Abell Brightest Cluster Galaxies (BCG), finding a generalised deVaucouleurs r(1/n) law, where n is a free parameter, to be appropriate. BCG typically have values of n greater than 4. The shape parameter n is shown to correlate with effective half-light radius, re, such that the larger BCG have larger values of n. This continues a trend noticed amongst ordinary elliptical galaxies and dwarf ellipticals, such that the brighter galaxies have larger values of n. Departures from the r(1/4) law are found to be a real feature of galaxy profiles, not due to observational errors or coupling of n with the other model parameters.

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