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The Polar-Ring Galaxies NGC 2685 and NGC 3808B (W 300)

Published online by Cambridge University Press:  12 April 2016

V. P. Reshetnikov  and
V. A. Yakovleva
V. P. Reshetnikov
Affiliation:
Astronomical Observatory, Leningrad State University, USSR
V. A. Yakovleva
Affiliation:
Astronomical Observatory, Leningrad State University, USSR

Extract

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Polar-ring galaxies (PRG) are among the most interesting examples of interaction between galaxies. A PRG is a galaxy with an elongated main body surrounded by a ring (or a disk) of stars, gas, and dust rotating in a near-polar plane (Schweizer, Whitmore, and Rubin, 1983). Accretion of matter by a massive lenticular galaxy from either intergalactic medium or a companion galaxy is usually considered as an explanation of the observed structure of PRG. In the latter case there are two possibilities: (1) capture and merging of a neighbor galaxy, and (2) accretion of mass from a companion galaxy during a close encounter. Two PRG formation scenarios just mentioned are illustrated here by the results of our observations of the peculiar galaxies NGC 2685 and NGC 3808B.

Type
III. Observations of Related Objects
Information
International Astronomical Union Colloquium , Volume 124: Paired and Interacting Galaxies , 1990 , pp. 231 - 244
Copyright
Copyright © NASA 1990

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