Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986lastr.100..510l&link_type=abstract
L'Astronomie (ISSN 0004-6302), vol. 100, Nov. 1986, p. 510-512. In French.
Astronomy and Astrophysics
Astronomy
Brightness Distribution, Solar Corona, Solar Flares, Stellar Structure, Astronomical Photography, Calibrating, Color Photography, Stellar Models
Scientific paper
White light observations of the brightness distribution of the solar corona as measured during total eclipses viewed with instrumentation in Kazakhistan in 1981. A 15 sec exposure, made on Ektachrome 64 film, provided data for calculating brightness curves as a function of radial distance from the solar equator and poles. Brightness contributions from the F and K coronal components were then derived. Sample data are provided for the variations in brightness with the number of sunspots, for the relationship of the brightness to the solar cycle, and the contribution of the inner corona to the total brightness. Two successive photographs of an evolving solar flare at the beginning of an eclipse are used to track the acceleration of the jet, variations in emission intensity with altitude above the sun and at different wavelengths, and the different emissions from cold and hot material.
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