The stellar response to growing oval distortions in disk galaxies

Details The stellar response to growing oval distortions in disk galaxies The stellar response to growing oval distortions in disk galaxies

Apr 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981apj...245...39t&link_type=abstract

Astrophysical Journal, Part 1, vol. 245, Apr. 1, 1981, p. 39-48.

Astronomy and Astrophysics

Astrophysics

16

Astronomical Models, Barred Galaxies, Disk Galaxies, Galactic Structure, Orbit Perturbation, Stellar Motions, Distortion, Equations Of Motion, Gravitational Fields, Particle Interactions, Star Distribution

Scientific paper

The time-dependent response of an ensemble of noninteracting test particles to a growing oval distortion in a model disk galaxy is calculated numerically. For the adopted model, the response inside corotation is found to be barlike and in phase with the perturbation, whereas outside corotation a two-armed, trailing spiral pattern is observed during the growth of the perturbation. Long periods of growth of the oval distortion that are in agreement with some recent N-body calculations lead to spiral patterns that persist for many galactic rotation periods.

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