THE SLENDER SOLAR TACHOCLINE - A MAGNETIC MODEL

Citation
G. Rudiger et Ll. Kitchatinov, THE SLENDER SOLAR TACHOCLINE - A MAGNETIC MODEL, Astronomische Nachrichten, 318(5), 1997, pp. 273-279
Citations number
22
Categorie Soggetti
Astronomy & Astrophysics
Journal title
ISSN journal
00046337
Volume
318
Issue
5
Year of publication
1997
Pages
273 - 279
Database
ISI
SICI code
0004-6337(1997)318:5<273:TSST-A>2.0.ZU;2-9
Abstract
A model for the sharp transition from differential rotation in the sol ar convection zone to rigid rotation in the radiative interior is pres ented. Differential rotation in the radiative zone is shown to be quen ched efficiently by an internal magnetic field. The poloidal field amp litude, B-0 is the input parameter for our model which determines the transition layer thickness and the toroidal field strength. It is illu strated analytically and confirmed numerically that a rather small fie ld, B-0 = 10(-4) Gauss, suffices to satisfy the helioseismological res trictions on the depth of the differential rotation penetration below the convection zone. The transition layer thickness decreases further with increasing B-0. The toroidal field amplitude B similar or equal t o 200 Gauss is almost independent of B-0.