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Radio Studies of the Quiet Sun at Decimetre and Metre Wavelengths

Published online by Cambridge University Press:  25 April 2016

R. P. Sinha  and
G. Swarup
R. P. Sinha
Affiliation:
Tata Institute of Fundamental Research, Bombay
G. Swarup
Affiliation:
Tata Institute of Fundamental Research, Bombay
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Extract

It is known that in the radio spertrum the limb of the quiet sun is brighter in the equatorial regions than near the pole. But most of the available theoretical calculations of the brightness distribution over the quiet sun have been made with the assumption of spherical symmetry. We have therefore calculated two-dimensional distributions at several decimetre and metre wavelengths, taking account of the observed asymmetry in the north-south direction. Newkirk’s method of ray-tracing was used, the calculations being made with a CDC 3600 computer. Some of the preliminary results (particularly for a sunspot minimum period) are presented here; they indicate that the electron temperature of the solar corona has a value of about 1 to 1.5 x 106 °K.

Type
Contributions
Information
Publications of the Astronomical Society of Australia , Volume 1 , Issue 2 , November 1967 , pp. 41 - 42
Copyright
Copyright © Astronomical Society of Australia 1967

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References

1 Smerd, S. F., Aust. J. Sci. Res. A 3, 34 (1950).Google Scholar
2 Newkirk, G., Ap. J., 133, 983 (1961).Google Scholar
3 van de Hulst, H. C., Bull. Astr. Inst. Neth., 11, 135 (1950).Google Scholar
4 O’Brien, P. A., Mon. Not. R. Astr. Soc, 113, 597 (1953).CrossRefGoogle Scholar
5 Moutot, M., and Boischot, A., Ann. d’Astrophys., 24, 172 (1961).Google Scholar
6 Fokker, A. D., Bull. Astr. Inst. Neth., 18, 359 (1966).Google Scholar
7 de Jager, C., Rendiconti S.I.F. Corso XII, 329 (1960).Google Scholar
8 Swamp, G., Kapahi, V. K., Isloor, J. D., and Sinha, R. P., Nature, 212, 910 (1966).Google Scholar
9 Christiansen, W. N., and Mathewson, D. S., ‘Paris Symposium on Radio Astronomy’, ed. Bracewell, R. N., Stanford University Press, 1959.Google Scholar