Radio observations of filaments during the eclipses of September 11, 1969 and March 7, 1970 |
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| Authors: | M Simon Bengt-Arne Wickström |
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| Institution: | (1) Dept. of Earth and Space Sciences, State University of New York, Stony Brook, N.Y., U.S.A.;(2) Dept. of Physics, State University of New York, Stony Brook, N.Y., U.S.A. |
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| Abstract: | By high resolution observations at 3 mm wavelength during the eclipses of September 11, 1969 and March 7, 1970 we have observed two filaments on the solar disc in absorption. We analyze in detail the 3.3 mm eclipse data and 9.5 mm (non-eclipse) data we have pertaining to the large filament observed on September 11, 1969. At 3.3 mm the plasma temperature in the filament is about 3900K, and at 9.5 mm it is about 6400K, indicating a multicomponent model. An upper bound of N
e
2
L < 1028 for the emission measure of a hot component at T > 104K is obtained. |
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