Drift-accretion theory of the spiral structure of galaxies

Details Drift-accretion theory of the spiral structure of galaxies Drift-accretion theory of the spiral structure of galaxies

Nov 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984esasp.207..215e&link_type=abstract

In ESA Plasma Astrophys. p 215-222 (SEE N85-22270 12-90)

Astronomy and Astrophysics

Astrophysics

Accretion Disks, Disk Galaxies, Galactic Structure, Spiral Galaxies, Galactic Nuclei, Galactic Rotation, Intergalactic Media, Separation

Scientific paper

The process of the spiral structure formation in galaxies with a bar-like nucleus due to matter accretion onto the disk is considered. The matter flow patterns in the galactic plane in the corotation resonance region are constructed. The separatrices in these patterns are similar to the spiral arms of some types of galaxies. It is shown that high density regions - spiral arms - arise near the separatrices as a result of the matter accretion onto the disk. The explanation of main peculiarities of spiral design is given. The analogue with wave-particle nonlinear interaction in plasma is pointed out.

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