Observations of the O I 1355.6 A and C I 1355.8 A lines in solar flares

Details Observations of the O I 1355.6 A and C I 1355.8 A lines in solar flares Observations of the O I 1355.6 A and C I 1355.8 A lines in solar flares

Jun 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980a%26a....86..377c&link_type=abstract

Astronomy and Astrophysics, vol. 86, no. 3, June 1980, p. 377-379.

Astronomy and Astrophysics

Astrophysics

5

Carbon, Chromosphere, Far Ultraviolet Radiation, Line Shape, Oxygen Atoms, Solar Flares, Electron Density (Concentration), Line Spectra, Satellite Observation, Solar Atmosphere, Solar Spectra, Ultraviolet Spectra

Scientific paper

The paper presents observations of the intersystem line O I 1355.6 A and the allowed line C I 1355.8 A in solar flares. In flares, the intersystem O I line is weaker than the allowed C I line and the intensity ratio O I/C I is 0.3-0.7. On the other hand, in active regions, O I line is stronger than the C I line and O I/C I is about 1-2, while in quiet sun regions, the O I line is much stronger than the C I line and O I/C I not in excess of 20. The variation of the intensity ratio from quiet sun region to flares may be due to an electron density enhancement of a factor of about 50 in flares.

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