Cycle 19 facula dynamics. I. Angular rotation

Details Cycle 19 facula dynamics. I. Angular rotation Cycle 19 facula dynamics. I. Angular rotation

Mar 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997a%26a...319..673m&link_type=abstract

Astronomy and Astrophysics, v.319, p.673-682

Astronomy and Astrophysics

Astrophysics

9

Sun: Faculae, Sun: Rotation, Sun: Activity, Sun: Magnetic Fields, Sunspots

Scientific paper

Our analysis of photospheric facula rotation throughout cycle 19 has yielded a number of new findings: (1) The existence of a strong north-south asymmetry of the rotation rates (of as much as 1 °/day), related to the magnetic activity level. (2) The presence of two distinct populations that possibly reflect the complexity of dynamo waves at the interface between the convective zone and the radiative zone. (3) A pattern of slow/fast rotation zones similar to the magnetic torsional oscillation discovered by Snodgrass (1991ApJ...383L..85S). Facula rotation showed little time-dependence throughout solar cycle.

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