Magnetohydrodynamics of atmospheric transients. III - Basic results of nonplane two-dimensional analysis

Details Magnetohydrodynamics of atmospheric transients. III - Basic results of nonplane two-dimensional analysis Magnetohydrodynamics of atmospheric transients. III - Basic results of nonplane two-dimensional analysis

Feb 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981apj...244..331n&link_type=abstract

Astrophysical Journal, Part 1, vol. 244, Feb. 15, 1981, p. 331-339.

Astronomy and Astrophysics

Astrophysics

22

Dynamic Response, Magnetohydrodynamics, Solar Atmosphere, Solar Flares, Magnetic Field Configurations, Magnetohydrodynamic Waves, Ring Currents, Solar Magnetic Field

Scientific paper

The dynamic response of a stratified atmosphere permeated by a magnetic field to a sudden localized energy release (e.g., the onset of a flare) is examined in a physically self-consistent manner within the approximation of axisymmetric two-dimensional magnetohydrodynamics. In contrast to the previous plane analyses, with the inclusion of out-of-plane components of magnetic and velocity fields, it is shown that the presence of transverse waves leads to spiraling material motions and formation of ring current with open (mostly radial) magnetic field configuration. In the closed (mostly azimuthal) magnetic field, the evolutionary response of a magnetic field is shown to follow the typical sequence observed with a flare, namely, the relaxations of magnetic shear toward the potential configuration. The details of the results are described with discussions on their physical significance.

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