Coronal plasmoid dynamics. I. Dissipative MHD approach

Details Coronal plasmoid dynamics. I. Dissipative MHD approach Coronal plasmoid dynamics. I. Dissipative MHD approach

Jan 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998a%26a...329.1111d&link_type=abstract

Astronomy and Astrophysics, v.329, p.1111-1118 (1998)

Astronomy and Astrophysics

Astrophysics

3

Sun: Corona, Sun: Magnetic Fields, Mhd

Scientific paper

Energy and momentum balance equations of the dissipative MHD approach are applied to the coronal plasmoid phenomenon observed with the Canada-France-Hawaii Telescope during the July 11, 1991 total solar eclipse. The situation is marginal for the applicability of the MHD description,which has been used for orders of magnitude estimates of the governing physical parameters. Their analysis confirms the suggestion about the possibility for a relatively cold but rapidly moving plasma body to heat the corona through dissipative viscous effects. It also shows that magnetic stresses, gas pressure gradients and viscous drags by the fast plasma flows from the chromosphere are viable candidates to lift the plasmoid against the gravity force.

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