Magnetohydrostatic modelling of stellar coronae

D. MacTaggart (Lead / Corresponding author), S. G. Gregory, T. Neukirch, J. -F. Donati

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

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.
Original languageEnglish
Pages (from-to)767-774
Number of pages8
JournalMonthly Notices of the Royal Astronomical Society
Volume456
Issue number1
Early online date17 Dec 2015
DOIs
Publication statusPublished - 11 Feb 2016

Keywords

  • MHD
  • methods: analytical
  • stars: coronae
  • stars: magnetic field

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