A model for sunspot associated emission at 6 CM wavelength

Details A model for sunspot associated emission at 6 CM wavelength A model for sunspot associated emission at 6 CM wavelength

Feb 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980a%26a....82...30a&link_type=abstract

Astronomy and Astrophysics, vol. 82, no. 1-2, Feb. 1980, p. 30-40. Research supported by the National Research Foundation of Gr

Astronomy and Astrophysics

Astrophysics

91

Astronomical Maps, Circular Polarization, Microwave Spectra, Solar Atmosphere, Solar Magnetic Field, Sunspots, Brightness Temperature, Chromosphere, Photosphere, Solar Corona, Solar Spectra, Temperature Gradients

Scientific paper

Two-dimensional maps of total intensity and circular polarization of a sunspot region at 6 cm have been calculated using a simple model for the chromosphere-corona transition region and observations of the longitudinal component of the photospheric magnetic field. The calculations are in good agreement with the high resolution observations of the same sunspot region at 6 cm, obtained with the Westerbork Synthesis Radio Telescope. It is shown that the 6 cm radiation is predominantly due to gyroresonance absorption process at the second and third harmonics of the gyrofrequency (H = 900-600 G). Estimates of the conductive flux and the electron density in the transition region above the sunspot are also given.

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