Solar differential rotation determined by polar crown filaments

Details Solar differential rotation determined by polar crown filaments Solar differential rotation determined by polar crown filaments

Jun 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991soph..133..195b&link_type=abstract

Solar Physics (ISSN 0038-0938), vol. 133, June 1991, p. 195-203.

Physics

18

Helioseismology, Solar Magnetic Field, Solar Prominences, Solar Rotation, Angular Velocity, Solar Diameter, Spectral Methods

Scientific paper

The rotation rates obtained by tracing 124 polar crown filaments are presented in comparison with previous results. Higher filament rotation rate in polar regions was detected and discussed in terms of the various phenomena such as: the projection effect due to the height of measured tracers, the connection of solar filaments with the magnetic field patterns (which show an increase of the rotation rate at high latitudes), rigid rotation of polar filaments which form pivot points, and eventual change of the differential rotation law during the cycle. However, when the height correction for an average height of 1 percent of the solar radius is applied, the filament rotation rate in polar regions decreases.

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