Electrodynamics of the outer solar atmosphere

Details Electrodynamics of the outer solar atmosphere Electrodynamics of the outer solar atmosphere

Jan 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983ssrv...34...47k&link_type=abstract

(COSPAR, IAU, IUGG, IUPAP, and URSI, International Symposium on Progress in Solar-Terrestrial Physics, 5th, Ottawa, Canada, May

Physics

5

Atmospheric Heating, Electrodynamics, Magnetohydrodynamic Waves, Plasma Heating, Solar Atmosphere, Solar Magnetic Field, Current Density, Photosphere, Plasma Resonance, Solar Corona, Thermodynamics

Scientific paper

Since large scale current systems are indicated by the structure of the outer solar atmosphere and its magnetic coupling to the photospheric motions, the heating and dynamics of coronal structures is governed by the electrodynamic coupling of these structures to the underlying photosphere. Heating is enhanced in a structured corona by such processes as the resonance absorption of Alfvenic surface waves, anomalous Joule heating, reconnection, and the related topological dissipation. Coronal structure global dynamic and thermal behavior can be described in terms of electrodynamic circuits stressing the role of photospheric boundaries. While coronal systems such as coronal loops can be stable, they may exhibit catastrophic behavior when current density surpasses a critical threshold.

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