The 1981 total solar eclipse corona. II - Global absolute photometric analysis

Details The 1981 total solar eclipse corona. II - Global absolute photometric analysis The 1981 total solar eclipse corona. II - Global absolute photometric analysis

Nov 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985a%26a...152..157l&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 152, no. 1, Nov. 1985, p. 157-164.

Astronomy and Astrophysics

Astrophysics

14

Astronomical Photometry, Luminous Intensity, Solar Corona, Solar Eclipses, Calibrating, Chromosphere, Stellar Structure

Scientific paper

Detailed results of the absolute photometry of the solar corona during the July 31, 1981 total eclipse are presented together with a morphological analysis. The basic calibration method uses the detailed photometry of images of stars present on the same coronal picture. Both sky intensity and coronal aureola variations over the field are carefully evaluated. The recent axi-symmetric non-spherical model of the F-corona is introduced and the relevant K-corona intensity variations are derived. The determinations of the Ludendorf index of flattening and the integrated total brightness of the K-corona alone are made and discussed in relation to the phase of the sunspot cycle of activity.

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