On the emission from the white light flare of 15 June 1991 in C I, C II, Mg II, and He II lines.

Details On the emission from the white light flare of 15 June 1991 in C I, C II, Mg II, and He II lines. On the emission from the white light flare of 15 June 1991 in C I, C II, Mg II, and He II lines.

Feb 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999kfnt...15...51b&link_type=abstract

Kinematika Fiz. Nebesn. Tel, Tom 15, No. 1, p. 51 - 58

Computer Science

3

Solar Flares: Carbon Lines, Solar Flares: Helium Lines, Solar Flares: Magnesium, Solar Flares: Line Profiles

Scientific paper

The spectra of the brightest kernel in the 1991 June 15 white light solar flare obtained during the impulsive phase are analysed. The magnesium and carbon lines represent a range of flare plasma temperatures from about 8000 K (C I) to 20000 K (C II). The authors give the central peak intensity wavelength, width at half maximum, total power radiated in the line obtained from the line emission analysis for the central part of the white light flare kernel. The emission lines of C I, Mg II, and He II are symmetrical, unshifted and have a Gaussian profile. The profiles of C II lines are asymmetrical, and fitting of two-Gaussian profiles to the C II λ657.8 nm line shows that there is a redshifted component in addition to the unshifted one. An upper temperature limit of about 30000 K was obtained for the He II emission region.

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