Physics
Scientific paper
Feb 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994soph..149..267d&link_type=abstract
Solar Physics, vol. 149, no. 2, p. 267-277
Physics
6
Emission Spectra, H Alpha Line, Magnetohydrodynamics, Solar Corona, Solar Prominences, Solar Spectra, Astronomical Spectroscopy, Coronagraphs, Filtergrams, Image Analysis, Image Processing, Microdensitometers
Scientific paper
A very faint H(alpha) emission in the solar corona registered on over-exposed photographs made by a coronagraph and an H(alpha) filter is studied. The over-exposed filtergrams have been processed by a Joyce Loebl automated microdensitometer and the two-dimensional scans have been analysed by the residual image method. A classification of the faint H(alpha) emission objects, revealed on the isodensity maps, is proposed and the latitudinal distribution, the morphology, and the location with respect to the other active phenomena are analyzed. Taking into account some possible plasma effects that could be caused by coronal magnetic field changes, a hydromagnetic interpretation of the faint H(alpha) emission is proposed.
Dermendjiev V. N.
Duchlev Peter
Leroy Jean-Louis
Mouradian Zadig
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