Observations on the slowly varying component of solar radio emission at decameter wavelengths

Details Observations on the slowly varying component of solar radio emission at decameter wavelengths Observations on the slowly varying component of solar radio emission at decameter wavelengths

Sep 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983soph...87..391s&link_type=abstract

Solar Physics (ISSN 0038-0938), vol. 87, Sept. 1983, p. 391-399.

Physics

12

Brightness Temperature, Decametric Waves, Solar Corona, Solar Radio Emission, Thermal Emission, Radial Distribution, Temperature Distribution

Scientific paper

The authors have made two-dimensional maps of the slowly varying component (SVC) of solar radio emission at a frequency of 34.5 MHz with half power beam width of 26'/40'. It is found that a majority of SVC sources have brightness temperatures of the order of 0.5×106K and half power widths of about 4 R_sun;. The shifts in the positions of the centroids of the SVC sources from the center of the Sun were in the range 1.5 to 2 R_sun;. These observations can be explained in terms of thermal emission from coronal regions of enhanced density and temperature located at distances of 1.5 to 2 R_sun; from the center of the Sun.

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