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Dumb-Bell Galaxies in Southern Clusters: Catalog and Preliminary Statistical Results

Published online by Cambridge University Press:  12 April 2016

G. Vettolani ,
L. Gregorini ,
P. Parma  and
H.R. de Ruiter
G. Vettolani
Affiliation:
Istituto di Radioastronomia del CNR, Bologna, Italy
L. Gregorini
Affiliation:
Istituto di Radioastronomia del CNR, Bologna, Italy Dipartimento di Astronomia, Università di Bologna, Italy
P. Parma
Affiliation:
Istituto di Radioastronomia del CNR, Bologna, Italy
H.R. de Ruiter
Affiliation:
Osservatorio Astronomico, Bologna, Italy

Extract

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The dominant galaxy of a rich cluster is often an object whose formation and evolution is closely connected to the dynamics of the cluster itself. Hoessel (1980) and Schneider et al. (1983) estimate that 50 % of the dominant galaxies are either of the dumb-bell type or have companions at projected distances less than 20 kpc, which is far in excess of the number expected from chance projection (see also Rood and Leir 1979).

Presently there is no complete sample of these objects, with the exception of the listing of dumb-bell galaxies in BM type I and I-II clusters in the Abell statistical sample of Rood and Leir (1979).

Type
III. Observations of Related Objects
Information
International Astronomical Union Colloquium , Volume 124: Paired and Interacting Galaxies , 1990 , pp. 261 - 264
Copyright
Copyright © NASA 1990

References

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