Morphological population and first-ranked galaxy morphology in loose groups of galaxies

Details Morphological population and first-ranked galaxy morphology in loose groups of galaxies Morphological population and first-ranked galaxy morphology in loose groups of galaxies

Dec 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987a%26a...188....1r&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 188, no. 1, Dec. 1987, p. 1-4. Research supported by the Ministero della Pubbl

Astronomy and Astrophysics

Astrophysics

4

Elliptical Galaxies, Galactic Clusters, Galactic Evolution, Galactic Structure, Astronomical Catalogs, Density Distribution

Scientific paper

We analyse the morphological content of loose groups of galaxies contained in Geller and Huchra's (1983) catalogue, according to the morphology of the first-ranked member. The population of the ellipticals in the groups with a first-ranked elliptical member turns out to be significantly higher than in the other groups, independently of the density, as estimated from the compactness of the groups as well as the distance from us. Furthermore, the fraction of ellipticals seems to be more strongly correlated with the local galaxian density for the groups with a first ranked elliptical galaxy than for the others.

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