Magnetohydrostatic modelling of stellar coronae
Abstract
We introduce to the stellar physics community a method of modelling stellar coronae that can be considered to be an extension of the potential field. In this approach, the magnetic field is coupled to the background atmosphere. The model is magnetohydrostatic and is a balance between the Lorentz force, the pressure gradient and gravity. Analytical solutions are possible and we consider a particular class of equilibria in this paper. The model contains two free parameters and the effects of these on both the geometry and topology of the coronal magnetic field are investigated. A demonstration of the approach is given using a magnetogram derived from Zeeman–Doppler imaging of the 0.75 M⊙ M-dwarf star GJ 182.
Citation
MacTaggart , D , Gregory , S , Neukirch , T & Donati , J-F 2016 , ' Magnetohydrostatic modelling of stellar coronae ' , Monthly Notices of the Royal Astronomical Society , vol. 456 , no. 1 , pp. 767-774 . https://doi.org/10.1093/mnras/stv2714
Publication
Monthly Notices of the Royal Astronomical Society
Status
Peer reviewed
ISSN
0035-8711Type
Journal article
Collections
Items in the St Andrews Research Repository are protected by copyright, with all rights reserved, unless otherwise indicated.