Bars and open spirals in density wave theory

Details Bars and open spirals in density wave theory Bars and open spirals in density wave theory

Jan 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989plap.work..335t&link_type=abstract

In ESA, Proceedings of an International School and Workshop on Plasma Astrophysics, Volume 1 p 335-340 (SEE N89-24910 18-75)

Physics

Plasma Physics

Barred Galaxies, Galactic Structure, Plasma Physics, Density Wave Model, Galactic Rotation, Wave Propagation

Scientific paper

It is shown that the linear theory of density waves in flat disk galaxies can describe, together with the usual tightly wound waves of Lin and Shu, a bar-like feature which always comes with the waves and dominates in the forbidden band around corotation where they are evanescent. This result is obtained analytically and confirmed by direct numerical integration of the relevant equations. The relevance of this feature to barred galaxies and to waves driven by external forcing is reviewed.

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