Physics
Scientific paper
Aug 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991soph..134..287a&link_type=abstract
Solar Physics (ISSN 0038-0938), vol. 134, Aug. 1991, p. 287-297.
Physics
21
Electric Current, H Alpha Line, Solar Activity, Solar Magnetic Field, Boundary Value Problems, Laplace Equation, Luminosity, Magnetic Field Configurations, Solar Corona
Scientific paper
The structure of magnetic-field and vertical electric currents is investigated in two active regions through a comparison of the observed transverse field, which was computed according to the Neumann boundary-value problem for the Laplace equation using the observed Hz value. Electric currents are calculated from observations of the transverse magnetic field. The results obtained indicate that the direction of the electric field affects H-alpha emission. This suggests that charged particle fluxes are responsible for H-alpha emission. It is inferred that the sources of charged particle fluxes and the region of enhanced luminosity of flocculi and flares in H-alpha are separated in height. In those places where the current is directed upward, the electric field facilitates electron motion from the corona to the chromosphere and impedes it in places with downward directed current. For positive ions, the situation is reversed.
Abramenko Valentina I.
Gopasiuk S. I.
Ogir' M. B.
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