Dynamo-generated magnetic fields in fast rotating single giants

• Published in: Proceedings of the International Astronomical Union
• Main Authors: Konstantinova-Antova, Renada, Aurière, Michel, Schröder, Klaus-Peter, Petit, Pascal
• Format: Article in Journal/Newspaper
• Language: English
• Published: Cambridge University Press (CUP) 2008
• Subjects: Astronomy and Astrophysics; Space and Planetary Science; narval
• Online Access: http://dx.doi.org/10.1017/s1743921309031020; https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S1743921309031020

Abstract Red giants offer a good opportunity to study the interplay of magnetic fields and stellar evolution. Using the spectro-polarimeter NARVAL of the Telescope Bernard Lyot (TBL), Pic du Midi, France and the LSD technique we began a survey of magnetic fields in single G-K-M giants. Early results include 6 MF-detections with fast rotating giants, and for the first time a magnetic field was detected directly in an evolved M-giant: EK Boo. Our results could be explained in the terms of α–ω dynamo operating in these giants.