Brightness of the photosphere and faculae at the limb based on eclipse observations

Details Brightness of the photosphere and faculae at the limb based on eclipse observations Brightness of the photosphere and faculae at the limb based on eclipse observations

Jun 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982azh....59..552a&link_type=abstract

(Astronomicheskii Zhurnal, vol. 59, May-June 1982, p. 552-562.) Soviet Astronomy, vol. 26, May-June 1982, p. 334-340. Translati

Astronomy and Astrophysics

Astronomy

Brightness Distribution, Faculae, Photosphere, Solar Eclipses, Solar Limb, Stellar Spectrophotometry, Spectrograms, Stellar Models, Surface Properties

Scientific paper

The absolute distributions of integral and surface brightness of the photospheric continuum and those in faculae at the very limb are obtained from slitless spectrograms of the total solar eclipse of July 10, 1972. Several possible reasons for the brightness increase twoard the limb in the distribution of photospheric surface brightness are discussed. The faculae showed high contrasts, up to 1.76 at a height of 200 km from the limb. A comparison of the times of local contacts observed and calculated with allowance for lunar relief showed that the active regions are at about 300 km above the photosphere. A schematic model of a facula is proposed.

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