EAS Publications Series
Volume 69-70, 2014What the Highest Angular Resolution Can Bring to Stellar Astrophysics?
|Page(s)||285 - 293|
|Published online||10 September 2015|
F. Millour, A. Chiavassa, L. Bigot, O. Chesneau, A. Meilland and Ph. Stee (eds)
EAS Publications Series, 69–70 (2014) 285-293
Direct detection of magnetism with spectrointerferometry
1 Université Grenoble Alpes, IPAG, 38000 Grenoble, France
CNRS, IPAG, 38000 Grenoble, France
2 Laboratoire Lagrange, UMR 7293, UNS-CNRS-OCA, Boulevard de l'Observatoire, BP. 4229, 06304 Nice Cedex 4, France
† O. Chesneau passed away before seeing this article he was involved in.
Stellar magnetism and activity are often studied thanks to various spectro-polarimetric techniques but generally the poor angular resolution drastically limits detection and/or diagnosis since the polarized signals are averaged over the stellar surface and thus can be cancelled because of symmetry degrees. Taking benefit of the unprecedent resolving power of optical long-baseline interferometry will be a significant gain, allowing the local polarized features to be studied. In this review we briefly describe the various methods that are classically used to detect and/or map magnetic fields, and then explain how optical interferometry can bring new and complementary observational information.
© EAS, EDP Sciences, 2015