Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995mnras.274..689l&link_type=abstract
Monthly Notices of the Royal Astronomical Society, Volume 274, Issue 3, pp. 689-693.
Astronomy and Astrophysics
Astronomy
3
Line: Profiles, Sun: Activity, Sun: Prominences
Scientific paper
The broadening mechanism of a prominence Hα line is mainly a combination of Doppler broadening and damping broadening, and Stark broadening can be neglected. In this paper, the relationships between an Hα self-reversal line of a solar prominence and its broadening mechanism are discussed. It is found that the characteristics of the prominence self-reversal line are not affected by any of the broadening mechanisms used, and, in general, the profile shape of the prominence Hα line with deep self-reversal is hardly changed by any of the broadening mechanisms used. The calculated parameters, such as the distance between the two peak points of a self-reversal line and the Doppler width of the line, are changed even less, i.e. the effects of broadening mechanisms on the prominence self-reversal line are very small. For the prominence line with shallow self-reversal, however, the profile shape is changed with any of the different broadening mechanisms used, i.e. the shallow hump is obviously changed, and the calculated parameters are greatly changed.
Ding Yujie J.
Li Kai-Jun
Zhong Shu-Hua
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