Diagnostics of the solar corona structure by the refraction effects on radio emission |
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| Authors: | V. M. Bogod A. S. Grebinskii L. V. Opeikina |
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| Affiliation: | 1. Special Astrophysical Observatory, Russian Academy of Sciences, Saint Petersburg, Russia
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| Abstract: | The solar disc radio brightness distribution observed at RATAN-600 can be interpreted as the angular directivity of the disk center emission at viewing anglesΘ=arcsin(R/R0) over an angular range of R<0.9R 0 at several wavelengths in the 2.0–32 cm region. These spectra can be treated as an emission enhancement due to refraction effects in free-free corona emission. The model simulations show good agreement with the observations and lead to estimation of the electron density Ne=1·10 9 cm?3 and emission measureEM=6·10 26 cm?5 for the quiet Sun. |
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