Dynamo-generated magnetic fields in fast rotating single giants

Details Dynamo-generated magnetic fields in fast rotating single giants Dynamo-generated magnetic fields in fast rotating single giants

2009-01-12

arxiv.org/abs/0901.1537v1

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

2 pages, 1 figure, proceedings of IAUS259: Cosmic Magnetic Fields

Scientific paper

10.1017/S1743921309031020

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 $\alpha$--$\omega$ dynamo operating in these giants.

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