Astronomy and Astrophysics – Astrophysics
Scientific paper
Aug 1977
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977a%26a....59..349k&link_type=abstract
Astronomy and Astrophysics, vol. 59, no. 3, Aug. 1977, p. 349-357. In French. Centre National de la Recherche Scientifique
Astronomy and Astrophysics
Astrophysics
9
Astronomical Photography, Optical Polarization, Polarimetry, Solar Corona, Solar Eclipses, Computer Techniques, Microdensitometers, Stellar Luminosity, Stellar Models
Scientific paper
Photographs of the white-light solar corona were obtained during the total solar eclipse of June 30, 1973 in two orthogonal components of polarization. The total intensity and fraction of polarization of the white-light corona were determined by means of a photographic method and also by a numerical method of reduction of the plates with a computer-controlled microdensitometer. The simple and quick photographic method provided results which were in very good agreement with the numerical ones. A procedure is described which permits the total intensity and fraction of polarization of the K corona alone to be computed and mapped, and a model for the transpolar coronal hole is deduced.
Dantel M.
Koutchmy Serge
Picat Jean-Pierre
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