Journal
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Volume 422, Issue 2, Pages 1272-1282Publisher
WILEY-BLACKWELL
DOI: 10.1111/j.1365-2966.2012.20703.x
Keywords
MHD; stars: AGB and post-AGB; stars: winds, outflows
Categories
Funding
- NSERC
- Canadian Foundation for Innovation
- British Columbia Knowledge Development Fund
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We present calculations for a magnetized hybrid wind model for Betelegeuse (alpha Orionis). The model is a direct application of our previously derived theory, combining a canonical Weber-Davis stellar wind with dust grains in the envelope of an asymptotic giant branch star. The resulting hybrid picture provides a mechanism for solving the problem of lifting stellar material up from the photosphere and into the circumstellar envelope. It also predicts wind velocities in agreement with current estimates. Our approach reveals that magnetic fields in supergiant stars like Betelgeuse may play a vital role in determining the nature of the stellar outflow and consequently opens a new avenue of investigation in the field of hybrid stellar winds.
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