Observations of prominences at 3.5 millimeter wavelength |
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Authors: | M R Kundu |
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Institution: | (1) Astronomy Program, University of Maryland, College Park, Md., U.S.A. |
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Abstract: | At 3.5 mm wavelength absorption features are observed in correspondence with H dark filaments on the disk; beyond the limb the prominences correspond to emissive regions. The absorption features are larger (2–3 arc) than the corresponding H dark filaments; the emissive regions at the limb have similar angular sizes. The emissive regions at the limb have electron temperatures of 5500±500 K; the amount of absorption observed on the disk leads to mean electron densities of about 5 × 1010 per cm3. |
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