Brightness of the photosphere and faculae at the limb based on eclipse observations
Journal Article
·
· Sov. Astron. (Engl. Transl.); (United States)
OSTI ID:6371229
The absolute distributions of integral and surface brightness of the photospheric continuum (lambdaroughly-equal5870 A) and 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 toward 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.
- Research Organization:
- Astronomical Observatory of Khar'kov State University
- OSTI ID:
- 6371229
- Journal Information:
- Sov. Astron. (Engl. Transl.); (United States), Journal Name: Sov. Astron. (Engl. Transl.); (United States) Vol. 26:3; ISSN SAAJA
- Country of Publication:
- United States
- Language:
- English
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