Abstract
The general features of the slowly varying component at centimeter and millimeter wavelengths are explained by magneto-ionic thermal emission. A model of an active region is constructed in which the electron temperature and density profile is based on recent EUV measurements, and the current-free magnetic field configuration is derived from a longitudinal magnetogram and scalar potential theory. In the model, the contributions of the reflected component of the inward extraordinary wave is important in determining the characteristic features of the radio flux and polarization. Emission by the mechanism of resonance absorption does not appear to be a significant factor in this model.
Similar content being viewed by others
References
Beckers, J. M. and Schröter, E. H.: 1969, Solar Phys. 10, 384.
Dupree, A. K. and Goldberg, L.: 1967, Solar Phys. 1, 229.
Edelson, S., Mayfield, E. B., and Shimabukuro, F. I.: 1971, Nature Phys. Sci. 232, 82.
Gingerich, O., Noyes, R. W., Kalkofen, W., and Cuny, Y.: 1971, Solar Phys. 18, 347.
Harvey, J. W.: 1971, private communication.
Kakinuma, T. and Swarup, G.: 1962, Astrophys. J. 136, 975.
Livingston, W. and Harvey, J. W.: 1971 in R. Howard (ed.), ‘Solar Magnetic Fields,’ IAU Symp. 43 51.
Nakagawa, Y., Raadu, M. A., Billings, D. E., and McNamara, D.: 1971, Solar Phys. 19, 72.
Noyes, R. W.: 1971, Ann. Rev. Astron. Astrophys. 9, 209.
Noyes, R. W., Withbroe, G. L., and Kirshner,: 1970, Solar Phys. 11, 388.
Ratcliffe, J. A.: 1959, The Magneto-Ionic Theory and its Applications to the Ionosphere, University Press, Cambridge.
Raadu, M. A. and Nakagawa, Y.: 1971, Solar Phys. 20, 64.
Tanaka, H. and Kakinuma, T.: 1958a, Rep. Ionosph. Res. Japan 12, 273.
Tanaka, H. and Kakinuma, T.: 1958b, Proc. Res. Inst. Atm. 5, 77.
Withbroe, G. L.: 1970, Solar Phys. 11, 42.
Zheleznyakov, V. V.: 1962, Soviet Astron. AJ 6, 3.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Shimabukuro, F.I., Chapman, G.A., Mayfield, E.B. et al. On the source of the slowly varying component at centimeter and millimeter wavelenghts. Sol Phys 30, 163–173 (1973). https://doi.org/10.1007/BF00156185
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF00156185