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Magnetic fields of AGB and post-AGB stars

Published online by Cambridge University Press:  30 December 2019

Wouter Vlemmings
Wouter Vlemmings*
Affiliation:
Chalmers University of Technology, Department of Space, Earth and Environment, Onsala Space Observatory, SE-43992 Onsala, Sweden email: wouter.vlemmings@chalmers.se
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Abstract

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There is ample evidence for the presence of strong magnetic fields in the envelopes of (post-)Asymptotic Giant Branch (AGB) stars as well as supergiant stars. The origin and role of these fields are still unclear. This paper updates the current status of magnetic field observations around AGB and post-AGB stars, and describes their possible role during these stages of evolution. The discovery of magnetically aligned dust around a supergiant star is also highlighted. In our search for the origin of the magnetic fields, recent observations show the signatures of possible magnetic activity and rotation, indicating that the magnetic fields might be intrinsic to the AGB stars.

Keywords

magnetic fieldspolarizationstars: AGB and post-AGBsupergiantsrotationspots
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 14 , Symposium S343: Why Galaxies Care About AGB Stars: A Continuing Challenge through Cosmic Time , August 2018 , pp. 19 - 26
Copyright
© International Astronomical Union 2019 

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