IR observations of the solar corona - A ring around the sun

Details IR observations of the solar corona - A ring around the sun IR observations of the solar corona - A ring around the sun

Feb 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981natur.289..779r&link_type=abstract

Nature, vol. 289, Feb. 26, 1981, p. 779, 780. Research supported by the Department of Space and Space Commission of India.

Astronomy and Astrophysics

Astronomy

10

Infrared Astronomy, Ring Structures, Solar Corona, Brightness, Emission Spectra, Equatorial Regions

Scientific paper

The possibility of a permanent ring structure around the sun was first pointed out by Brecher et al. (1979) from evolutionary physical and chemical considerations as well as constraints arising from observational astronomy related to the sun and its immediate neighborhood. In particular, Brecher et al. concluded that such a ring, located at approximately four solar radii, must consist of refractory particles (graphite, for example) of size greater than 10 km at approximately 1,000-2,000 K which, therefore, would emit thermal radiation peaking around 1.5-3.0 microns. An attempt to detect the existence of this ring structure utilizing the IR observations taken during optimal viewing conditions of the total solar eclipse of February 16, 1980, is reported.

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