Luminosities of first-ranked galaxies

Details Luminosities of first-ranked galaxies Luminosities of first-ranked galaxies

Nov 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984pasp...96..874m&link_type=abstract

Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 96, Nov. 1984, p. 874-879.

Astronomy and Astrophysics

Astronomy

3

Galactic Clusters, Luminosity, Density (Number/Volume), Elliptical Galaxies

Scientific paper

A number of first-ranked galaxies in poor and rich clusters have absolute magnitudes which correlate well with the richness classes of their parent clusters. The correlation is consistent with the statistical theory for the luminosities of first-ranked galaxies in clusters advocated by Geller and Peebles (1976). This does not rule out spectral process theories but suggests that, if special processes do occur, their effects may be somewhat nonuniform from cluster to cluster. It is shown that the commonly observed small dispersion in the absolute magnitudes of giant elliptical galaxies is a result of: (1) the size of the sampling aperture used and (2) the intrinsic gradients of their observed surface brightness profiles. Parameters associated with the dominant galaxies do not correlate well with Bautz-Morgan class.

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