Astronomy and Astrophysics – Astrophysics
Scientific paper
Sep 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979a%26as...37..591d&link_type=abstract
Astronomy and Astrophysics Supplement Series, vol. 37, Sept. 1979, p. 591-600. Research supported by the Consiglio Nazionale de
Astronomy and Astrophysics
Astrophysics
51
Elliptical Galaxies, Ellipticity, Galactic Clusters, Galactic Structure, Astronomical Catalogs, Curves (Geometry), Southern Hemisphere
Scientific paper
Ellipticity profiles and isophotal structures of 75 elliptical galaxies with declinations south of approximately -23 deg are compared. The sample studied includes both isolated ellipticals and members of pairs, multiplets, groups, and clusters. It is found that: (1) elliptical galaxies present four trends as a function of radius, viz., constant, peaked, decreasing, and increasing outward; (2) there is a correlation between ellipticity profile and membership in groups or clusters; (3) the brightest ellipticals in rich groups and compact clusters have ellipticity profiles that increase with radius; and (4) rotation of the major axis of the isophotes is correlated with asymmetry of the isophotes, regardless of the class of ellipticity profile.
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