Elliptic stellar disks - Equilibrium solutions in the presence of a halo and in binary systems

Details Elliptic stellar disks - Equilibrium solutions in the presence of a halo and in binary systems Elliptic stellar disks - Equilibrium solutions in the presence of a halo and in binary systems

Jan 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983afz....19...65b&link_type=abstract

(Astrofizika, vol. 19, Jan.-Mar. 1983, p. 65-78) Astrophysics (ISSN 0571-7132), vol. 19, no. 1, July 1983, p. 38-47. Translation

Astronomy and Astrophysics

Astrophysics

6

Binary Stars, Elliptical Galaxies, Equilibrium Equations, Halos, Stellar Gravitation, Astronomical Models, Centrifugal Force, Kinetic Energy, Tides

Scientific paper

The properties of equilibrium solutions are studied for elliptical stellar disks with quadratic gravitational potential in the field of the tidal forces of a neighboring galaxy in a binary system or in a homogeneous spheroidal halo. Results indicate that these regions are restricted either to disks in which the gravitation along one of the axes is balanced by the centrifugal forces or to dust disks in which there is no spread of the velocities of the stars at any point. It is found that disks in binary systems can be elongated along the axis joining the centers of the galaxies or compressed along this axis, whereas dust solutions are possible only for compressed disks in binary systems. It is determined that dwarf galaxies in the field of tidal forces of a giant galaxy can be situated much closer to the companion in the compressed form than in the elongated form because of the greater resistance to disruption. A method is developed for estimating the approximate upper limit of the ratio of the masses of galaxies in pairs from their relative geometrical parameters.

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