Rotating motion in solar surges

Details Rotating motion in solar surges Rotating motion in solar surges

Dec 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984cha%26a...8..294x&link_type=abstract

Chinese Astronomy and Astrophysics, Volume 8, Issue 4, p. 294-298.

Astronomy and Astrophysics

Astrophysics

1

Scientific paper

The line-of-sight velocity field of the solar limb surge of 1980 Oct 11, observed at Yunnan Observatory, showed a rotating motion. The velocity of rotation and the true ascending speed of the surge were determined from Hα observations. We also found an accompanying expansion at several tens of km/s and the presence of a pulsed phenomenon with a period of a few minutes at the root of the surge. We point out that the steep density gradient between the surge plasma and its surrounding atmosphere causes double-pole diffusion, and the electric field generated by the double-pole diffusion causes electric drift of the surge plasma, hence the rotation.

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