The magnetic field in the prominences of the polar crown

Details The magnetic field in the prominences of the polar crown The magnetic field in the prominences of the polar crown

Feb 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983soph...83..135l&link_type=abstract

Solar Physics, vol. 83, Feb. 1983, p. 135-142.

Physics

148

Solar Cycles, Solar Magnetic Field, Solar Prominences, Angular Resolution, Magnetic Field Configurations, Periodic Variations, Photosphere, Polar Regions

Scientific paper

The Hanle effect method has been applied to the determination of the magnetic field in 120 prominences of the polar crown observed during the 1974-1980 period. The average field strength which was about 6 G at the beginning of the cycle reached twice this value just before the maximum. There is also a clear trend for an increase of the prominence field with the altitude. The authors confirm that the magnetic vector makes a small angle (25°) with the long axis of the prominence. As to the field orientation, they show that the most striking feature lies in the regular pattern of the component which is parallel to the axis of the filament; its direction seems to depend closely on the polarities of the high latitude photospheric field.

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