Computer Science
Scientific paper
Jan 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991natur.349..223g&link_type=abstract
Nature (ISSN 0028-0836), vol. 349, Jan. 17, 1991, p. 223-225. Research supported by USAF.
Computer Science
31
Helioseismology, Solar Cycles, Solar Interior, Solar Oscillations, Solar Rotation, Angular Velocity, Solar Activity, Solar Diameter, Solar Magnetic Field
Scientific paper
It is shown here that helioseismic data suggest that the sun's internal rotation rate, at depths greater than half the solar radius, has changed systematically during the most recent cycle. There is no variation, however, in the rotation over a range of intermediate solar radii covering the upper part of the sun's radiative interior and the lower part of the convective zone; this intermediate region is where, according to the same helioseismic data, an abrupt change in rotation rate with depth accompanies the transition from convective to radiative structure. It is suggested that the modulation of the rotation rate in the sun's interior could be caused by a torsional oscillation, provided that a poloidal magnetic field of kilogauss strength exists in the radiative interior.
Dziembowski Wojciech A.
Goode Philip. R.
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