Polar Ring Currents on the sun During a Polar Magnetic Field Reversal

Details Polar Ring Currents on the sun During a Polar Magnetic Field Reversal Polar Ring Currents on the sun During a Polar Magnetic Field Reversal

May 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003soph..214...55m&link_type=abstract

Solar Physics, v. 214, Issue 1, p. 55-63 (2003).

Physics

5

Scientific paper

We have studied the variations of the height of polar crown prominences according to daily observations of the Sun at the Kodaikanal Observatory (India) during 1905-1975. Polar ring filaments at latitudes 60°-80° are related to the polar magnetic field reversal. A double decrease of the height of polar ring filaments was found in the course of their migration from 40°to the poles. We estimated the limiting height of the equilibrium of polar ring filaments from the stability condition of a strong electric current. We found that the transition from large-scale to small-scale ring filaments reduces the critical height of the stability for the prominences. A model of an inverse-polarity filament was used.

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