Differential Rotation of Strong Magnetic Flux During Solar Cycles 21 - 23

Details Differential Rotation of Strong Magnetic Flux During Solar Cycles 21 - 23 Differential Rotation of Strong Magnetic Flux During Solar Cycles 21 - 23

May 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011soph..270...35s&link_type=abstract

Solar Physics, Volume 270, Issue 1, pp.35-43

Physics

Magnetic Fields, Rotation

Scientific paper

In the present investigation we measure the differential rotation of strong magnetic flux during solar cycles 21 - 23 with the method of wavelet transforms. We find that the cycle-averaged synodic rotation rate of strong magnetic flux can be written as ω=13.47-2.58sin 2 θ or ω=13.45-2.06sin 2 θ-1.37sin 4 θ, where θ is the latitude. They agree well with the results derived from sunspots. A north-south asymmetry of the rotation rate is found at high latitudes (28°< θ<40°). The strong flux in the southern hemisphere rotates faster than that in the northern hemisphere by 0.2 deg day-1. The asymmetry continued for cycles 21 - 23 and may be a secular property.

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