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Discovery of a magnetic field in the B2 IV star ζ Cassiopeia

Published online by Cambridge University Press:  17 November 2003

J. Arnaud ,
N. Meunier ,
V. C. Geers ,
H. F. Henrichs  and
C. Neiner
V. C. Geers
Affiliation:
Astronomical Institute "Anton Pannekoek", University of Amsterdam, Kruislaan 403, 1098 SJ, Amsterdam, The Netherlands
H. F. Henrichs
Affiliation:
Astronomical Institute "Anton Pannekoek", University of Amsterdam, Kruislaan 403, 1098 SJ, Amsterdam, The Netherlands
C. Neiner
Affiliation:
Astronomical Institute "Anton Pannekoek", University of Amsterdam, Kruislaan 403, 1098 SJ, Amsterdam, The Netherlands
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Abstract

We report on our discovery of a magnetic field in the B2IV star ζ Cas. We determine the rotation period from the UV wind behaviour. We summarize the results from spectropolarimetric observations of ζ Cas obtained in 2001 and 2002 with the MuSiCoS échelle spectropolarimeter at the 2 m Télescope Bernard Lyot (TBL). We also find a non-radial pulsation mode and confirm that the star is N-enriched. This is the third detection of a magnetic field in an early B-type variable star and the first one in a SPB star.

Type
Research Article
Information
European Astronomical Society Publications Series , Volume 9: Magnetism and Activity of the Sun and Stars , 2003 , pp. 265
Copyright
© EAS, EDP Sciences, 2003

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