Parker instability in the interstellar medium

Details Parker instability in the interstellar medium Parker instability in the interstellar medium

May 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977crasb.284..397a&link_type=abstract

Academie des Sciences (Paris), Comptes Rendus, Serie B - Sciences Physiques, vol. 284, no. 18, May 9, 1977, p. 397-399. In Frenc

Physics

Cosmic Rays, Galactic Structure, Interstellar Gas, Interstellar Magnetic Fields, Magnetohydrodynamic Stability, Galactic Radiation, Gas Pressure, Gravitational Fields, Milky Way Galaxy, Stellar Gravitation

Scientific paper

A formalism is developed for studying two-dimensional equilibria of a system consisting of thermal gas, a magnetic field, and cosmic rays in a region of the Galaxy of the order of several hundred parsecs in the gravitational field of the disk stars. The thermal gas and cosmic rays are assumed to be perfect fluids with scalar pressure. The MHD energy principle is used to investigate the Parker instability. For two-dimensional equilibria the expression for the volume energy functional reveals two possible destabilization sources: field curvature and the gravitational field.

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