Astronomy and Astrophysics – Astronomy
Scientific paper
May 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995a%26at....7..287b&link_type=abstract
Astronomical and Astrophysical Transactions, vol. 7, Issue 4, pp.287-287
Astronomy and Astrophysics
Astronomy
Double Galaxies, Dynamics
Scientific paper
The stability of elliptical disks in pairs and inside a uniform halo is investigated. A density distribution giving a quadratic gravitational potential of the disk is considered. Tidal forces in binaries and the uniform halo do not violate the quadratic form of the potential. Quadrupole and dipole perturbations are investigated. A dipole instability of the elliptical disk in the ellipsoidal halo is obtained. Elliptical disks in binaries may be elongated and compressed relative to the companion. At low mass components, the elongated disks are stable at slow rotation and compressed disks, at the rapid one. The region of various stability are constructed for quadrupole disk perturbations in binaries and inside the spheroidal halos for different masses, distances between companions and axis ratios.
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