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Magnetic observations of pulsating B and Be stars with ESPaDOnS and Narval

Published online by Cambridge University Press:  01 November 2008

James Silvester ,
C. Neiner ,
H. F. Henrichs ,
G. A. Wade ,
E. Alecian  and
V. Petit
James Silvester
Affiliation:
Department of Physics, Queen's University, Kingston, Ontario, Canada, K7L 3N6 Department of Physics, Royal Military College of Canada, Kingston, ON, Canada, K7K 7B4
C. Neiner
Affiliation:
GEPI, Observatoire de Paris, CNRS, 5 place Jules Janssen, 92190 Meudon, France
H. F. Henrichs
Affiliation:
Astronomical Institute “Anton Pannekoek”, University of Amsterdam, The Netherlands
G. A. Wade
Affiliation:
Department of Physics, Royal Military College of Canada, Kingston, ON, Canada, K7K 7B4
E. Alecian
Affiliation:
Department of Physics, Royal Military College of Canada, Kingston, ON, Canada, K7K 7B4
V. Petit
Affiliation:
Départment de physique, CRAQ, Université Laval, Québec, Canada, G1K 7P4
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Abstract

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Discoveries of magnetic fields in pulsating B and Be stars have been claimed from low-resolution spectropolarimetric observations with FORS1 at VLT. We used the new generation of high-resolution spectropolarimeters, ESPaDOnS at CFHT and NARVAL at TBL, to check for the existence of these fields. We find that most of the claimed magnetic stars do not host a magnetic field. This work shows the importance of a critical analysis of FORS1 data when searching for weak magnetic fields in early-type stars and the advantage of using ESPaDOnS and NARVAL to study such type of stars.

Keywords

Stars: magnetic fields – techniques: polarimetric – stars: early-type – stars: emission-line, Be
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 4 , Symposium S259: Cosmic Magnetic Fields: From Planets, to Stars and Galaxies , November 2008 , pp. 391 - 392
Copyright
Copyright © International Astronomical Union 2009

References

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