Effect of the explosion of supernovae and superbubbles on the Galactic dynamo

Details Effect of the explosion of supernovae and superbubbles on the Galactic dynamo Effect of the explosion of supernovae and superbubbles on the Galactic dynamo

May 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apj...391..188f&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 391, no. 1, May 20, 1992, p. 188-198.

Astronomy and Astrophysics

Astrophysics

34

Dynamo Theory, Galactic Evolution, Milky Way Galaxy, Plasma Bubbles, Supernovae, Astronomical Models, Interstellar Magnetic Fields, Magnetic Field Reconnection

Scientific paper

A simple analytical expression for the alpha-parameter is derived based on the action of supernova and superbubble explosions on the mean Galactic magnetic field. Superbubbles are about 7 times more efficient than isolated supernovae at generating radial field from azimuthal field (alpha-effect). The resulting alpha-parameter increases linearly with Galactic height up to about 100 pc (where it reaches a value of order 0.13 km/s), then flattens out and turns over at about 250 pc.

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