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Heliograph Observations of both Fast Drift (Type III) and Continuum (Type IV) Solar Emission from the one Source high above the Solar Limb

Published online by Cambridge University Press:  25 April 2016

R. A. Duncan
R. A. Duncan*
Affiliation:
Division of Radiophysics, CSIRO, Sydney
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Extract

Many authors (e.g. Magun et al. 1975) have debated the question ‘does solar type IV continuum emission arise through Langmuir wave conversion or through gyro-synchrotron emission?’ Culgoora radio spectrograph and heliograph observations of the late stages of a recent (7 September 1977) type II, IV event showed both type IV* (continuum) and transient type III (electron-beam) emission coming from the same source, high above the solar limb. These observations suggest that this particular type IV continuum arose through a mechanism similar to that of the type III, probably fundamental Langmuir-wave emission, in a corona with a tenfold enhancement of plasma density.

Type
Research Article
Information
Publications of the Astronomical Society of Australia , Volume 3 , Issue 4 , 1978 , pp. 253 - 256
Copyright
Copyright © Astronomical Society of Australia 1978

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References

Daene, H.., Scholz, D., and Voigt, W., Heinrich Hertz Inst. Suppl. Ser. Solar Data, 11, No. 2, 131 (1970).Google Scholar
Dulk, G. A., Smerd, S. F., MacQueen, R. M., Gosling, J. T., Magun, A., Stewart, R. T., Sheridan, K. V., Robinson, R. D., and Jacques, S., Solar Phys., 49, 369(1976).CrossRefGoogle Scholar
Kai, K., Solar Phys. (in press, 1978).Google Scholar
Magun, A., Stewart, R. T., and Robinson, R. D., Proc. Astron. Soc. Aust., 2, 367 (1975).CrossRefGoogle Scholar
Ramaty, R., and Lingenfelter, R. E., J. Geophys. Res., 72, 879 (1967).CrossRefGoogle Scholar
Razin, V. A., Radiofiz., 3, 584 (1960).Google Scholar
Schmahl, E. J., Aust. J., Phys. Astrophys. Suppl. No. 29, 1 (1973).Google Scholar
Solar-Geophysical Data, No. 399 I, and No. 403 II, NOAA, U.S. Dept. Commerce, Boulder (1978).Google Scholar
Stewart, R. T., Aust. J. Phys., 18, 67 (1965).CrossRefGoogle Scholar
Suzuki, S., Ann. Tokyo Astron. Obs., 8, No. 2 (1961).Google Scholar
Suzuki, S., and Sheridan, K. V.,Radiofiz., 20, 1432 (1977).Google Scholar
van de Hulst, H. C., Bull. Astron. lnstit. Neth., 11, 135 (1950).Google Scholar
Wild, J. P., and Smerd, S. F., Ann. Rev. Astron. Astrophys., 10, 159 (1972).CrossRefGoogle Scholar
Wild, J. P., Smerd, S. F., AND Weiss, A. A., Ann. Rev. Astron. Astrophys., 1, 291 (1963).Google Scholar