Radio Observations of the Quiet Sun at 49 cm

Details Radio Observations of the Quiet Sun at 49 cm Radio Observations of the Quiet Sun at 49 cm

Nov 1966

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1966natur.212..910s&link_type=abstract

Nature, Volume 212, Issue 5065, pp. 910-911 (1966).

Physics

1

Scientific paper

THE brightness distribution over the quiet Sun was investigated at wavelengths of 50 and 60 cm by Panovkin and Ovsiankin1 and O'Brien and Tandberg-Hansen2 with the help of two aerial interferometers during the years 1954 and 1955. Both series of observations showed much less limb brightening than was predicted theoretically3 on the basis of optically derived values of electron densities and temperature in the solar corona. The disagreement was explained4-6 by assuming that inhomogeneities in the solar corona scatter radio waves. Observations made using an interferometer of high resolution located near Bombay are found to be consistent with theoretical distributions based on a smooth corona and indicate that earlier measurements may be unreliable because of insufficient resolution.

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