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Bisymmetric Spiral Magnetic Fields and Gravitational Instabilities of Galactic Disks

Published online by Cambridge University Press:  19 July 2016

T. Sawa  and
M. Fujimoto
T. Sawa
Affiliation:
1 Department of Earth Sciences, Aichi University of Education, Kariya, Aichi 448, Japan
M. Fujimoto
Affiliation:
2 Department of Physics, Nagoya University, Nagoya 464-01, Japan

Abstract

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Linearized equations of motion are solved for the self-gravitating gaseous disk in interaction with the Lorentz force due to the bisymmetric spiral (BSS) magnetic fields. Since the pattern velocity of the BSS fields is very close to that of the spiral density wave, a nearly-resonant interaction occurs between these two waves to enhance spiral condensation of gas. The BSS fields seem to compensate the spiral density waves for their secular dispersion.

Type
4. Magnetohydrodynamics of Galactic Magnetic Fields
Information
Symposium - International Astronomical Union , Volume 140: Galactic and Intergalactic Magnetic Fields , 1990 , pp. 125 - 126
Copyright
Copyright © Kluwer 1990 

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