Astronomy and Astrophysics – Astrophysics
Scientific paper
Jan 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983apj...264..392d&link_type=abstract
Astrophysical Journal, Part 1, vol. 264, Jan. 15, 1983, p. 392-407. Research supported by the U.S. Department of Energy and NAS
Astronomy and Astrophysics
Astrophysics
47
Astronomical Models, Barred Galaxies, Circular Orbits, Elliptical Galaxies, Galactic Structure, Precession, Gravitational Fields, Kinematics, Oblate Spheroids, Orbit Calculation, Spiral Galaxies
Scientific paper
An analytic method is described by means of which the preferred planes into which gas will settle by dissipative differential precession in a slightly nonspherical, nonstatic potential can be determined. Attention is given to the analysis of circular orbit precession in the external potential of a slightly prolate spheroidal mass that is tumbling about a short axis, providing a crude model for barred spiral galaxies as well as for prolate elliptical ones. The results obtained agree with previous work on the existence, orientation, and stability of periodic orbits in triaxial potentials. Depending on the source and injection geometry of the gas and on the nature of dissipation in the gas, the orbital dynamics presented could lead to enhanced, or even catastrophic, radial inflow and to steady state warped structures.
Burns Joseph A.
Dobrovolskis Anthony R.
Durisen Richard H.
Tohline Joel E.
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