Astronomy and Astrophysics – Astrophysics
Scientific paper
Sep 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985cha%26a...9..201y&link_type=abstract
Chinese Astronomy and Astrophysics, Volume 9, Issue 3, p. 201-205.
Astronomy and Astrophysics
Astrophysics
Scientific paper
The authors assume the prominence (or flare) to be a rotating cylinder. For the two cases of the spin velocity being a constant and having a gradient, they calculate the profile of the Balmer lines and their variation from the centre of the prominence to the edge, and establish methods for finding the spin velocity from the inclination or shift of the lines and the velocity gradient from the curvature of the lines. These methods are then applied to the observed data of the ring flare of 1981 April 27.
Jin Jie-Hai
Ye Shi-Hui
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