Stability of the toroidal magnetic field in rotating stars

Abstract

The magnetic field in stellar radiation zones can play an important role in phenomena such as mixing, angular momentum transport, etc. We study the effect of rotation on the stability of a predominantly toroidal magnetic field in the radiation zone. In particular we considered the stability in spherical geometry by means of a linear analysis in the Boussinesq approximation. It is found that the effect of rotation on the stability depends on a magnetic configuration. If the toroidal field increases with the spherical radius, the instability cannot be suppressed entirely even by a very fast rotation. Rotation can only decrease the growth rate of instability. If the field decreases with the radius, the instability has a threshold and can be completey suppressed.

5 pages, 4 figures, to appear on Astronomy and Astrophysics. arXiv admin note: text overlap with arXiv:1110.3340

References in corpus (8)

• On magnetic instabilities and dynamo action in stellar radiation zones
• Stability of Toroidal Magnetic Fields in Rotating Stellar Radiation Zones
• Protoneutron star dynamos: pulsars, magnetars, and radio-silent X-ray emitting neutron stars
• Stability of magnetic configurations containing the toroidal and axial fields
• Non-axisymmetric instability of axisymmetric magnetic fields
• Breakdown of chiral symmetry during saturation of the Tayler instability
• Stability of the toroidal magnetic field in stellar radiation zones
• Resonance instability of axially-symmetric magnetostatic equilibria

Cited by in corpus (4)

• 3D evolution of magnetic fields in a differentially rotating stellar radiative zone
• Solar ${\bar{\nu }}_e$ flux: Revisiting bounds on neutrino magnetic moments and solar magnetic field
• Stability of toroidal magnetic fields in stellar interiors
• A perturbation study of axisymmetric strongly magnetic degenerate stars : the case of super-Chandrasekhar white dwarfs