Astronomy and Astrophysics – Astronomy
Scientific paper
Apr 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987azh....64..244v&link_type=abstract
Astronomicheskii Zhurnal (ISSN 0004-6299), vol. 64, Mar.-Apr. 1987, p. 244-254. In Russian.
Astronomy and Astrophysics
Astronomy
1
Elliptical Galaxies, Galactic Evolution, Gravitational Effects, Orbital Mechanics, Galactic Clusters, Galactic Rotation, Spiral Galaxies, Tides, Torque
Scientific paper
The dynamics of close noncontact binary galaxies is investigated. It is demonstrated that tidal interaction is ineffective for circulation of galaxy orbits. Nonsphericity of galaxies develops a torque in a binary system. For a pair of elliptical galaxies this torque leads to "swinging" of the galaxies with respect to the orbital plane (which can be observed as a rotation about the minor axis) and to the excitation of internal degrees of freedom. Besides, this "pendulum effect" may be effective for elliptical galaxies in clusters, due to the presence of the torque produced by the cluster as a whole. In the case of spiral galaxies the torque leads to the precession of their rotational axes. However, this effect seems to be too weak to be observable.
Chernin Arthur D.
Verner Dmitri A.
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