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Catala Claude, Donati Jean-François, Shkolnik E. L., Bohlender David A., Alecian Evelyne

The magnetic field of the planet-hosting star tau Bootis

Monthly notices of the Royal Astronomical Society, 2007, vol. 374, pp. L42-L46

Référence ADS : 2007MNRAS.374L..42C

Résumé :

We have obtained high-resolution spectropolarimetric data for the planet-hosting star tau Bootis, using the ESPaDOnS spectropolarimeter at the Canada-France-Hawaii Telescope (CFHT). A weak but clear Stokes V signature is detected on three of the four nights of 2006 June during which we have recorded data. This polarimetric signature indicates with no ambiguity the presence of a magnetic field at the star's surface, with intensity of just a few gauss.

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