Equilibrium and stability of galaxies in binary systems

Details Equilibrium and stability of galaxies in binary systems Equilibrium and stability of galaxies in binary systems

Aug 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986esasp.251...21b&link_type=abstract

In ESA Proceedings of the Joint Varenna-Abastumani International School and Workshop on Plasma Astrophysics p 21-29 (SEE N87-15

Physics

Accretion Disks, Binary Stars, Elliptical Galaxies, Gravitational Fields, Kinetic Equations, Collisionless Plasmas, Field Theory (Physics), Magnetohydrodynamic Stability

Scientific paper

For galactic elliptical disks with quadratic gravitational potential in binary systems, equilibrium solutions are obtained to the noncollisional kinetic equation with a selfconsistent field. The companion is taken into account in a tidal approximation, preserving quadraticity of the potential. Stability of the solutions is investigated relative to bar-like perturbations corresponding to transitions between ellipses of different shape and oscillations of ellipses in the plane of symmetry. Aperiodic instabilities are shown to exist in binary systems, which are absent in single disks.

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