Observation in Crimea of solar eclipse of August, 1 2008 at wavelength 10.5 and 12 cm in the epoch of a minimum of Sun activity

  • Yu. Yurovsky Crimean Astrophysical Observatory, Nauchny, 298409

Abstract

Analysis of observation of eclipse of August, 1, 2008 at wavelengths of 10.5 and 12 cm showed, that in the epoch of deep minimum between the 23th and 24th cycles of sun activity a radioradius of solar disk in equatorial direction was large on 120⋅103 km in comparison with the radioradius in polar direction. The brightness temperature of polar region was equal about (35–37)⋅103 K and it corresponded to the radiation of emission from the upper layers of chromosphere with a height an about 11⋅103 km. An increase of radio brightness up to 100⋅103 K was observed on the helio-latitudes <25° outside of a visible disk in the distance of about 70⋅103 km from a photosphere. That testifies to an increase the concentration of electrons in the equatorial zone of corona at complete absence of groups of spots on solar disk.

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References

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Published
2009-06-01
How to Cite
Yurovsky Y., 2009. Izvestiya Krymskoi Astrofizicheskoi Observatorii, vol. 105, no. 1, pp. 57-65. Available at: https://jn.craocrimea.ru/index.php/izvcrao/article/view/881 (Accessed: 3December2020)
Section
Research articles