Gasdynamical calculations of preferred planes in prolate and triaxial galaxies. I - Case of no figure rotation

Details Gasdynamical calculations of preferred planes in prolate and triaxial galaxies. I - Case of no figure rotation Gasdynamical calculations of preferred planes in prolate and triaxial galaxies. I - Case of no figure rotation

Feb 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985apj...289..540h&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 289, Feb. 15, 1985, p. 540-555.

Astronomy and Astrophysics

Astrophysics

54

Astronomical Models, Galactic Rotation, Galactic Structure, Hydrodynamic Equations, Particle Motion, Angular Momentum, Boundary Value Problems, Galactic Nuclei, Precession

Scientific paper

Spiral galaxies are sustained by centrifugal force, and their equilibrium figure is an oblate spheroid. In the case of elliptical galaxies, however, it is not well understood what the equilibrium figure is. A number of studies have, therefore, been conducted to clarify remaining questions regarding elliptical galaxies. In these studies, the particle motions in a given potential were followed, and the stability of orbits was examined. It is pointed out, however, that for a comparison of the theoretical works with observations, it is important to investigate realistic gas motion in a prolate or a triaxial potential. Such a study has not been presented until now. For this reason, the present investigation is concerned with numerical studies of gas motion in a prolate and a triaxial galaxy potential. The results of the investigation will be presented in a series of papers. The present paper is the first one. It has the objective to explore the case without tumbling. Attention is given to the time required for the gas to settle into a preferred plane, and the mechanism for loss of angular momentum.

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