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Direct detection of magnetism with spectrointerferometry

Published online by Cambridge University Press:  10 September 2015

K. Perraut ,
J.-B. Le Bouquin  and
O. Chesneau
K. Perraut
Affiliation:
Université Grenoble Alpes, IPAG, 38000 Grenoble, France CNRS, IPAG, 38000 Grenoble, France
J.-B. Le Bouquin
Affiliation:
Université Grenoble Alpes, IPAG, 38000 Grenoble, France CNRS, IPAG, 38000 Grenoble, France
O. Chesneau*
Affiliation:
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.
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Abstract

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.

Type
Research Article
Information
European Astronomical Society Publications Series , Volume 70: What the Highest Angular Resolution Can Bring to Stellar Astrophysics? , 2014 , pp. 285 - 293
Copyright
© EAS, EDP Sciences, 2015

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