Magnetic fields of AGB and post-AGB stars
Abstract
There is ample evidence for 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, 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.
Cite
@article{arxiv.1903.05353,
title = {Magnetic fields of AGB and post-AGB stars},
author = {Wouter Vlemmings},
journal= {arXiv preprint arXiv:1903.05353},
year = {2019}
}
Comments
8 pages, 6 figures; invited review to appear in IAU Symposium 343, Why Galaxies Care About AGB Stars, (eds.) F. Kerschbaum, M. Groenewegen and H. Olofsson. Updates and partly reproduces previous reviews (Vlemmings 2014, 2018)