Modelling the Corona of HD 189733 in 3D
Abstract
The braking of main sequence stars originates mainly from their stellar wind. The efficiency of this angular momentum extraction depends on the rotation rate of the star, the acceleration profile of the wind and the coronal magnetic field. The derivation of scaling laws parametrizing the stellar wind torque is important for our understanding of gyro-chronology and the evolution of the rotation rates of stars. In order to understand the impact of complex magnetic topologies on the stellar wind torque, we present three- dimensional, dynamical simulations of the corona of HD 189733. Using the observed complex topology of the magnetic field, we estimate how the torque associated with the wind scales with model parameters and compare those trends to previously published scaling laws.
Keywords
Cite
@article{arxiv.1411.2494,
title = {Modelling the Corona of HD 189733 in 3D},
author = {Antoine Strugarek and Allan Sacha Brun and Sean P. Matt and Victor Réville and Jean-François Donati and Claire Moutou and Rim Fares},
journal= {arXiv preprint arXiv:1411.2494},
year = {2014}
}
Comments
6 pages, 3 figures, to appear in the proceedings of the French Astronomy and Astrophysics Society (SF2A) conference