Observation and analysis of the asymmetry of CaII K line of solar flares

Details Observation and analysis of the asymmetry of CaII K line of solar flares Observation and analysis of the asymmetry of CaII K line of solar flares

Dec 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991acasn..32..353y&link_type=abstract

(Acta Astronomica Sinica, vol. 32, no. 4, 1991, p. 353-361) Chinese Astronomy and Astrophysics (ISSN 0275-1062), vol. 16, no. 2,

Astronomy and Astrophysics

Astrophysics

Calcium, Line Spectra, Solar Flares, Spectrum Analysis, H Alpha Line, Nonequilibrium Thermodynamics, Solar Atmosphere, Spectral Energy Distribution

Scientific paper

A study of the CaII K line spectra of eight flares observed with the Solar Tower Telescope at Nanjing University is presented. It is seen that the red asymmetry is common to all flares and is most obvious near the maximum of the K line intensity. By employing the non-LTE theory when calculating the CaII K line profiles, it is shown that the asymmetry may be explained by the movement of material around the temperature minimum region.

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