EAS Publications Series

Magnetism and Activity of the Sun and Stars
J. Arnaud and N. Meunier (eds)
EAS Publications Series, Vol. 9, 2003
DOI: 10.1051/eas:2003108

Magnetic fields and pulsation in B and Be stars

C. Neiner^{1, 2}, H.F. Henrichs¹, A.-M. Hubert², M. Floquet² and V.C. Geers¹

¹ Sterrenkundig Instituut Anton Pannekoek, Universiteit van Amsterdam, Kruislaan 403, 1998 SJ Amsterdam, The Netherlands
² Observatoire de Meudon, France

Abstract
We have searched for magnetic fields in several early B-type stars: $\beta$ Cephei, Slowly Pulsating B (SPB) and in particular Be stars. We recall the properties of these stars and highlight the problem of the Be phenomenon. We discuss two clues towards understanding this phenomenon in terms of pulsations and magnetic fields. We summarize results from spectropolarimetric observations obtained at the Pic du Midi (France) and highlight the results for the Be star $\omega$ Ori and the $\beta$ Cep star V2052 Oph.

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