Gasdynamical calculations of preferred planes in prolate and triaxial galaxies. II - The case of a tumbling potential

Details Gasdynamical calculations of preferred planes in prolate and triaxial galaxies. II - The case of a tumbling potential Gasdynamical calculations of preferred planes in prolate and triaxial galaxies. II - The case of a tumbling potential

Mar 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988apj...326...84h&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 326, March 1, 1988, p. 84-100.

Statistics

Computation

25

Galactic Structure, Gas Dynamics, Computational Astrophysics, Galactic Rotation, Ring Galaxies

Scientific paper

The gas motion in a prolate or a triaxial potential with figure rotation ("tumbling") is calculated by a "smoothed particle" method in order to investigate whether or not the gas settles into the preferred plane, which is predicted by single-particle orbit studies. A rotating gas ring or a rotating gas disk is initially assumed to be tilted to the major axis of a logarithmic-type potential which tumbles about the shortest axis. The final fates of gas rings are different depending on the initial direction of the angular momentum vector, the potential shape, and the gas rotation sense. A retrograde gas disk settles into the warped preferred plane within a few ×109yr, as predicted by single-particle orbital investigations. The gas finally concentrates into the galactic center in the case of a prograde or retrograde ring in a prolate or triaxial potential with sufficient elongation.

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