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Title: TOROIDAL FIELD REVERSALS AND THE AXISYMMETRIC TAYLER INSTABILITY

Abstract

We present axisymmetric numerical simulations of the solar interior, including the convection zone and an extended radiative interior. We find that differential rotation in the convection zone induces a toroidal field from an initially purely poloidal field. This toroidal field becomes unstable to the axisymmetric Tayler instability and undergoes equatorward propagating toroidal field reversals. These reversals occur in the absence of a dynamo and without accompanying poloidal field reversals. The nature and presence of such reversals depends sensitively on the initial poloidal field strength imposed, with north-south symmetric reversals only seen at a particular initial field strength. Coupled with a dynamo mechanism which regenerates the poloidal field this could be one ingredient in the sunspot cycle.

Authors:
 [1]
  1. Department of Planetary Sciences, University of Arizona, Tucson, AZ 85719 (United States)
Publication Date:
OSTI Identifier:
21578389
Resource Type:
Journal Article
Journal Name:
Astrophysical Journal
Additional Journal Information:
Journal Volume: 735; Journal Issue: 2; Other Information: DOI: 10.1088/0004-637X/735/2/100; Journal ID: ISSN 0004-637X
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; AXIAL SYMMETRY; COMPUTERIZED SIMULATION; CONVECTION; INSTABILITY; MAGNETOHYDRODYNAMICS; SUN; ENERGY TRANSFER; FLUID MECHANICS; HEAT TRANSFER; HYDRODYNAMICS; MAIN SEQUENCE STARS; MASS TRANSFER; MECHANICS; SIMULATION; STARS; SYMMETRY

Citation Formats

Rogers, T. M. TOROIDAL FIELD REVERSALS AND THE AXISYMMETRIC TAYLER INSTABILITY. United States: N. p., 2011. Web. doi:10.1088/0004-637X/735/2/100.
Rogers, T. M. TOROIDAL FIELD REVERSALS AND THE AXISYMMETRIC TAYLER INSTABILITY. United States. doi:10.1088/0004-637X/735/2/100.
Rogers, T. M. Sun . "TOROIDAL FIELD REVERSALS AND THE AXISYMMETRIC TAYLER INSTABILITY". United States. doi:10.1088/0004-637X/735/2/100.
@article{osti_21578389,
title = {TOROIDAL FIELD REVERSALS AND THE AXISYMMETRIC TAYLER INSTABILITY},
author = {Rogers, T. M.},
abstractNote = {We present axisymmetric numerical simulations of the solar interior, including the convection zone and an extended radiative interior. We find that differential rotation in the convection zone induces a toroidal field from an initially purely poloidal field. This toroidal field becomes unstable to the axisymmetric Tayler instability and undergoes equatorward propagating toroidal field reversals. These reversals occur in the absence of a dynamo and without accompanying poloidal field reversals. The nature and presence of such reversals depends sensitively on the initial poloidal field strength imposed, with north-south symmetric reversals only seen at a particular initial field strength. Coupled with a dynamo mechanism which regenerates the poloidal field this could be one ingredient in the sunspot cycle.},
doi = {10.1088/0004-637X/735/2/100},
journal = {Astrophysical Journal},
issn = {0004-637X},
number = 2,
volume = 735,
place = {United States},
year = {2011},
month = {7}
}