Non-linear structures in self-gravitating disks

Details Non-linear structures in self-gravitating disks Non-linear structures in self-gravitating disks

Dec 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994a%26a...292..686l&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 292, no. 2, p. 686-692

Astronomy and Astrophysics

Astrophysics

5

Astronomical Models, Disks, Galactic Evolution, Gravitation, Molecular Clouds, Perturbation, Spiral Galaxies, Wave Interaction, Elliptic Functions, Green'S Functions, Hamiltonian Functions, Hydrodynamic Equations, Wentzel-Kramer-Brillouin Method

Scientific paper

The non-linear development and the evolution of a perturbation in self-gravitating disks are investigated on the basis of wave-wave interaction. It is shown that the perturbation is unstable with respect to self-modulation and self-focusing. The analysis is applied to spiral structure in spiral galaxies and to periodically spaced fragmentation of filaments in molecular clouds.

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