Magnetic superbubbles in the galactic disk and halo

Details Magnetic superbubbles in the galactic disk and halo Magnetic superbubbles in the galactic disk and halo

May 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993ppcn.conf..371m&link_type=abstract

In ESA, Fourth International Toki Conference on Plasma Physics and Controlled Nuclear Fusion p 371-374 (SEE N94-22624 05-75)

Physics

Plasma Physics

Galactic Evolution, Galactic Mass, Interstellar Matter, Magnetic Field Configurations, Magnetohydrodynamic Waves, Magnetohydrodynamics, Shock Waves, Computerized Simulation, Interstellar Magnetic Fields, Magnetic Clouds, Space Plasmas, Star Formation Rate

Scientific paper

The evolution of the interstellar superbubbles arising from sequential supernova explosions or winds from OB associations in the galactic disk is studied. A two dimensional magnetohydrodynamics (MHD) code is used. It is found that in the presence of horizontal magnetic fields of strength comparable to that in the galactic disk, the vertical expansion of the superbubbles can, under some conditions, be significantly inhibited by the effect of a decelerating J by B force. The outermost effect of the disturbance actually propagates somewhat faster than in nonmagnetic cases, as an MHD fast shock or nonlinear wave. The implications of the results for the galactic fountain are discussed.

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