Stability of elliptic stellar disks. I - Balanced disks

Details Stability of elliptic stellar disks. I - Balanced disks Stability of elliptic stellar disks. I - Balanced disks

May 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984afz....20..547b&link_type=abstract

(Astrofizika, vol. 20, May-June 1984, p. 547-563) Astrophysics (ISSN 0571-7132), vol. 20, no. 3, Nov. 1984, p. 302-313. Translat

Astronomy and Astrophysics

Astrophysics

5

Disk Galaxies, Galactic Structure, Spiral Galaxies, Gravitational Fields, Kinetic Equations, Mass Ratios

Scientific paper

The stability of balanced elliptical disks with quadratic gravitational potential relative to bar-like perturbations for binary systems and in the presence of a spheroidal halo is investigated. It is shown that in binary systems elongated disks and compressed disks close to the circular ones are aperiodically unstable. Strongly compressed disks are stable for large ratio of masses: M/M2 or M2/M is greater ≡30; oscillating instability takes place for intermediate mass ratio. The disks in the uniform spheroidal halo are stabilized relative to the bar-like perturbations if the gravitational potential of the halo exceeds one half of the gravitational potential of the disk.

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