Freytag, Bernd

Contact Email: Bernd.Freytag@astro.uu.se
Institute: Department for Astronomy and Space Physics at Uppsala University,
Box 515 SE-75120 Uppsala Sweden
Research URL:http://www.astro.uu.se/~bf/
Subject Area: Stellar Atmospheres, Circumstellar Material
Waveband: Optical
Technique: Computational Astrophysics
Presentation: Poster Display
Title: Hotspots in numerical simulations of Betelgeuze
Abstract: The spatial inhomogeneities on the surface of Betelgeuze revealed by modern interferometric observations are usually modelled by zero to three hot spots on a circular disk. While the surface structure appears to be generally consistent with an explanation as large-scale granular intensity fluctuations, the nature of the spots remains unclear. In this contribution, recent results from 3D radiation hydrodynamics simulations of a red supergiant with the new code COBOLD will be presented and a mechanism to produce hot spots will be discussed.