Abstract
We 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 × 106 K and half power widths of about 4 R ⊙. 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 ⊙. 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 ⊙ from the center of the Sun.
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Sastry, C.V., Shevgaonkar, R.K. & Ramanuja, M.N. Observations on the slowly varying component of solar radio emission at decameter wavelengths. Sol Phys 87, 391–399 (1983). https://doi.org/10.1007/BF00224848
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DOI: https://doi.org/10.1007/BF00224848