Nonlinear interaction of spiral density waves in flat galaxies

Journal Article · Thu May 01 04:00:00 EDT 1980 · Sov. Astron. AJ (Engl. Transl.); (United States)

OSTI ID:7027260

Raevskii, M A

Equations describing the nonlinear interaction of spiral density waves in flat galaxies are obtained by the method of averaged Lagrangians. Galaxies are modeled by an infinitely thin gas disk. The instability of a moderate-amplitude density wave against nonlinear breakup into several trigger spiral waves is considered; the conditions whereby such instability can set in are established and its growth rate is determined. Mutual interaction of spiral density waves should be taken into account when discussing the evolution of spiral arms in galaxies.

• Research Organization: Gor'kii Radiophysics Institute
• OSTI ID: 7027260
• Journal Information: Sov. Astron. AJ (Engl. Transl.); (United States), Journal Name: Sov. Astron. AJ (Engl. Transl.); (United States) Vol. 24:3; ISSN SAAJA
• Country of Publication: United States
• Language: English

Related Subjects

640105* -- Astrophysics & Cosmology-- Galaxies
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BASIC INTERACTIONS
GALACTIC EVOLUTION
GALAXIES
GRAVITATIONAL INSTABILITY
GRAVITATIONAL INTERACTIONS
GRAVITATIONAL WAVES
INSTABILITY
INTERACTIONS
MATHEMATICAL MODELS
NONLINEAR PROBLEMS
PLASMA INSTABILITY