Is the galactic corona produced by galactic flares

Details Is the galactic corona produced by galactic flares Is the galactic corona produced by galactic flares

May 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980apj...238...98s&link_type=abstract

Astrophysical Journal, Part 1, vol. 238, May 15, 1980, p. 98-102. Research supported by the Japan Society for the Promotion of

Astronomy and Astrophysics

Astrophysics

20

Cosmic Plasma, Galactic Rotation, Interstellar Magnetic Fields, Milky Way Galaxy, Coronas, Energy Conversion, Flares, Magnetohydrodynamic Stability, Plasma Heating

Scientific paper

The effect of the differential rotation of the disk of the galaxy on magnetic field which penetrates the disk is considered. The magnetic field will be progressively distorted from a potential (current-free) form and will at some stage become unstable. We expect, from knowledge of solar flares, that an MHD instability, a resistive instability, or a combination of the two, will result in the release of the excess magnetic energy, and that part of the released energy will be converted into heat. By estimating the energy release and the rate at which this process will occur and by assuming that this energy input is balanced by radiation, we obtain estimates of the parameters of the resulting plasma. It appears that this process alone can heat a galactic corona to temperatures of order one-million K.

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