Submillimeter brightness spike at the solar limb

Details Submillimeter brightness spike at the solar limb Submillimeter brightness spike at the solar limb

Mar 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975natur.254...38b&link_type=abstract

Nature, vol. 254, Mar. 6, 1975, p. 38, 39. Research supported by the Science Research Council and Delegation Generale a la Reche

Astronomy and Astrophysics

Astronomy

16

Brightness Temperature, Solar Eclipses, Solar Limb, Spicules, Submillimeter Waves, Data Reduction, Fine Structure, Infrared Astronomy, Microwave Interferometers, Radiant Flux Density, Solar Flux Density, Solar Spectra

Scientific paper

Submillimeter observations made with a rapid-scanning interferometer during the solar eclipse of June 30, 1973 are reported. Reduction, correction, and plotting of the data is described, and the obtained results show that the spike can be identified with emission from chromospheric spicules. Models of spicules from optical wavelength data indicate that the spicules are optically thick through the submillimeter range. A more detailed analysis on the number density and length distribution of the spicules above the photosphere, in the region near the chromopause, is pending. It is noted that an examination of large scale brightness distributions across the sun was prevented by time limitations, and that submillimetric limb brightening still remains a mystery.

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