The Yellow Emission Line of the Solar Corona
โ Scribed by LAYZER, DAVID
- Book ID
- 109581509
- Publisher
- Nature Publishing Group
- Year
- 1955
- Tongue
- English
- Weight
- 205 KB
- Volume
- 175
- Category
- Article
- ISSN
- 0028-0836
- DOI
- 10.1038/175647a0
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The profiles of the Fe XlV, 25303, and Fe x, 26374, emission lines of the solar corona have been observed at different positions using a photoelectric scanning Fabry-Perot interferometer. These profiles were obtained during the eclipse of 7th March 1970, in Mexico and at the Pic-du-Midi coronagraph
Recent R-matrix calculations of electron impact excitation rates in FexlI are used to derive the theoretical emission line ratio R I = I(195 1 ~)/I(1242 A,), which as potentially a useful electron density diagnoshc for the solar inner corona (r < 1.05 R o ). These results are found to be significant
Three solar outbursts which show pulsating radio emissions at metric waves (239 MHz) are examined. The behaviour of the single frequency, high-time resolution records and the spectral diagrams seem to indicate that such phenomena are peculiar phases of type IV radiation, perhaps connected with absor