Astrophysical and stellar magnetism

  • Dorch, Bertil F. (Project manager)
  • Nordlund, Åke (Working partner)
  • Freytag, Bernd (Working partner)
  • Archontis, V. (Working partner)
  • Gudiksen, Boris V. (Working partner)
  • Christensen, Majken Brahe Ellegaard (In charge of work packages)

Project: Research

Project Details

Description

Astrophysical theories and magneto-hydrodynamical computer simulations are compared to astronomical observations of stars, especially dwarf stars such as The Sun and supergiants exemplified by alfa Orionis (Betelgeuse).

Key findings

Both detailed 3-dimensional magneto-hydrodynamical numerical simulations and subsequent astronomical observations have now shown that the red supergiant star Alpha Orionis aka. Betelgeuse is magnetic and likely driven by an astrophysical dynamo relying on supergranular convection flows.

Layman's description

The red star Betelegeuse also known as Orion's shoulder is magnetic due to enormous energy flows on scales larger than our Sun itself. What was first theorized in this project using computer models, was later confirmed by modern observations. Indeed, stars like Betelgeuse have spots, similar to the well-known sunspots of our own star, although Betelgeuse and the Sun are very different types of stars.
Short titleStellar magnetism
AcronymMAGSTAR
StatusActive
Effective start/end date10/04/2002 → …

Keywords

  • Astronomy
  • Astrophysics
  • Stars
  • Dynamos
  • Betelgeuse
  • The Sun
  • Supergiants
  • Supernovae