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A MiMeS analysis of the magnetic field and circumstellar environment of the weak-wind O9 sub-giant star HD 57682

Published online by Cambridge University Press:  12 July 2011

Jason H. Grunhut ,
Gregg A. Wade ,
Wagner L. F. Marcolino  and
Véronique Petit
Jason H. Grunhut
Affiliation:
Kingston, Canada
Gregg A. Wade
Affiliation:
Kingston, Canada
Wagner L. F. Marcolino
Affiliation:
Marseille, France
Véronique Petit
Affiliation:
West Chester, USA
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Abstract

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I will review our recent analysis of the magnetic properties of the O9IV star HD 57682, using spectropolarimetric observations obtained with ESPaDOnS at the Canada-France-Hawaii telescope within the context of the Magnetism in Massive Stars (MiMeS) Large Program. I discuss our most recent determination of the rotational period from longitudinal magnetic field measurements and Hα variability - the latter obtained from over a decade's worth of professional and amateur spectroscopic observations. Lastly, I will report on our investigation of the magnetic field geometry and the effects of the field on the circumstellar environment.

Keywords

instrumentation: polarimeterstechniques: spectroscopicstars: magnetic fieldsstars: rotationstars: individual (HD 57682)

References

Grunhut, J. H., Wade, G. A., Marcolino, W. L. F., Petit, V. et al. 2009, MNRAS, 400, L94CrossRefGoogle Scholar
ud-Doula, A. & Owocki, S. P. 2002, ApJ, 576, 413CrossRefGoogle Scholar