Swing amplification of spiral waves in low-mass discs

Details Swing amplification of spiral waves in low-mass discs Swing amplification of spiral waves in low-mass discs

May 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990a%26a...231..347p&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 231, no. 2, May 1990, p. 347-353.

Statistics

Computation

5

Disk Galaxies, Gravitational Effects, Spiral Galaxies, Computational Astrophysics, Density Wave Model, Gravitational Fields, Wentzel-Kramer-Brillouin Method

Scientific paper

The Swing amplification of spiral waves in flat self-gravitating disks is considered in the limit of weak self-gravity (or low temperature). An analytic expression is derived for the amplification coefficient, related to the thin disk geometry and to the gravitational wakefield effect. Numerical solution gives the connection between this and the hydrodynamical instability of a disk without self-gravity.

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