A differential rotation driven dynamo in a stably stratified star
arXiv:astro-ph/0509693 · doi:10.1051/0004-6361:20054241
Abstract
We present numerical simulations of a self-sustaining magnetic field in a differentially rotating non-convective stellar interior. A weak initial field is wound up by the differential rotation; the resulting azimuthal field becomes unstable and produces a new meridional field component, which is then wound up anew, thus completing the `dynamo loop'. This effect is observed both with and without a stable stratification. A self-sustained field is actually obtained more easily in the presence of a stable stratification. The results confirm the analytical expectations of the role of Tayler instability.
Submitted to A&A
References in corpus (2)
Cited by in corpus (86)
- Modules for Experiments in Stellar Astrophysics (MESA): Giant Planets, Oscillations, Rotation, and Massive Stars
- MESA Isochrones and Stellar Tracks (MIST). I: Solar-Scaled Models
- Pre-Supernova Evolution of Massive Single and Binary Stars
- Rotating Massive Main-Sequence Stars I: Grids of Evolutionary Models and Isochrones
- Magnetic fields of non-degenerate stars
- The surprising magnetic topology of tauSco: fossil remnant or dynamo output?
- Slowing the Spins of Stellar Cores
- Angular Momentum Transport in Stellar Interiors
- Angular momentum transport within evolved low-mass stars
- On magnetic instabilities and dynamo action in stellar radiation zones
- Magnetars: Properties, Origin and Evolution
- Evolution of massive population III stars with rotation and magnetic fields
- Dynamo theories
- Magnetic spots on hot massive stars
- First evidence of a magnetic field on Vega. Towards a new class of magnetic A-type stars
- Diagnoses to unravel secular hydrodynamical processes in rotating main sequence stars
- Maximum gravitational-wave energy emissible in magnetar flares
- On the Stability of Non Force-Free Magnetic Equilibria in Stars
- Magnetic massive stars as progenitors of "heavy" stellar-mass black holes
- The fate of fallback matter around newly born compact objects
- The stability of toroidal fields in stars
- Explaining the most energetic supernovae with an inefficient jet-feedback mechanism
- Discovery of two magnetic massive stars in the Orion Nebula Cluster: a clue to the origin of neutron star magnetic fields?
- General relativistic simulations of pasive-magneto-rotational core collapse with microphysics
- Magnetic Field Generation in Stars
- The dynamics of the radiative envelope of rapidly rotating stars. I. A spherical Boussinesq model
- Rotation rate of the solar core as a key constraint to magnetic angular momentum transport in stellar interiors
- Observational effects of magnetism in O stars: surface nitrogen abundances
- Magnetic fields in massive stars, their winds, and their nebulae
- The Role of the Magnetorotational Instability in Massive Stars
- Young magnetars with fracturing crusts as fast radio burst repeaters
- Modeling the early evolution of massive OB stars with an experimental wind routine
- Turbulent Mixing in the Surface Layers of Accreting Neutron Stars
- Periodic magnetorotational dynamo action as a prototype of nonlinear magnetic field generation in shear flows
- Effect of a fossil magnetic field on the structure of a young Sun
- Weak magnetic fields in early-type stars: failed fossils
- Transport processes in stars: diffusion, rotation, magnetic fields and internal waves
- 3D evolution of magnetic fields in a differentially rotating stellar radiative zone
- Mode switching and oscillations in PSR B1828-11
- Magnetic fields driven by tidal mixing in radiative stars
- Helicity generation and alpha-effect by Vandakurov-Tayler instability with z-dependent differential rotation
- Amplification and stability of magnetic fields and dynamo effect in young A stars
- Theoretical limits on magnetic field strengths in low-mass stars
- Precursor flares of short gamma-ray bursts from crust yielding due to tidal resonances in coalescing binaries of rotating, magnetized neutron stars
- Subcritical dynamos in shear flows
- Fossil field decay due to nonlinear tides in massive binaries
- Fast fossil rotation of neutron star cores
- How can newly born rapidly rotating neutron stars become magnetars?
- Interplay between magnetic fields and differential rotation in a stably stratified stellar radiative zone
- Millisecond Magnetars
- The magneto-rotational instability in massive stars
- Gamma-ray bursts and Population III stars
- Evidence of active MHD instability in EULAG-MHD simulations of solar convection
- Numerical simulations of the Tayler-Spruit dynamo in proto-magnetars
- Burn Out or Fade Away? On the X-ray and Magnetic Death of Intermediate Mass Stars
- Magnetic fields generated by r-modes in accreting millisecond pulsars
- Magnetohydrodynamic Simulations of the Tayler Instability in Rotating Stellar Interiors
- Stochastic gravitational wave background from magnetic deformation of newly born magnetars
- Large-scale ordered magnetic fields generated in mergers of helium white dwarfs
- Revisiting Kepler-444. II. Rotational, orbital and high-energy fluxes evolution of the system
- The Tayler Instability in the Anelastic Approximation
- The spins of stripped B stars support magnetic internal angular momentum transport
- Stability Analysis of Magnetised Neutron Stars - A Semi-analytic Approach
- Evolution and Nucleosynthesis of Very Massive Stars
- Can very massive Population III stars produce a super-collapsar?
- Energy distribution in nonaxisymmetric magnetic Taylor-Couette flow
- Multidimensional Simulations of Core Convection
- Generation of strong magnetic fields by r-modes in millisecond accreting neutron stars: induced deformations and gravitational wave emission
- Tayler-Spruit dynamo in stably stratified rotating fluids: Application to proto-magnetars
- Critical fields and growth rates of the Tayler instability as probed by a columnar gallium experiment
- Kinematic Dynamo, Supersymmetry Breaking, and Chaos
- Tayler Instability Revisited
- Stability of toroidal magnetic fields in stellar interiors
- Toroidal Field Reversals and the Axisymmetric Tayler Instability
- On obliquely magnetized and differentially rotating stars
- Rotation profiles of solar-like stars with magnetic fields
- Baroclinically-driven flows and dynamo action in rotating spherical fluid shells
- Magnetic fields in O-, B- and A-type stars on the main sequence
- Magnetic field generated by r-modes in accreting quark stars
- Toroidal field instability and eddy viscosity in Taylor-Couette flows
- A perturbation study of axisymmetric strongly magnetic degenerate stars : the case of super-Chandrasekhar white dwarfs
- Faraday Rotation Distributions from Stellar Magnetism in Wind-Blown Bubbles
- Exploring the probing power of gamma-Dor's inertial dip for core magnetism: case of a toroidal field
- Flows and dynamos in a model of stellar radiative zones
- A study of the electrostatic properties of the interiors of low-mass stars: Possible implications for the observed rotational properties
- Coronal and chromospheric emission in A-type stars