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Discovery of the most rapidly-rotating, non-degenerate, magnetic massive star by the MiMeS collaboration

Published online by Cambridge University Press:  12 July 2011

Jason H. Grunhut ,
Gregg A. Wade ,
Thomas Rivinius ,
Wagner L. F. Marcolino  and
Richard H.D. Townsend
Jason H. Grunhut
Affiliation:
Kingston, Canada
Gregg A. Wade
Affiliation:
Kingston, Canada
Thomas Rivinius
Affiliation:
ESOChile
Wagner L. F. Marcolino
Affiliation:
Marseille, France
Richard H.D. Townsend
Affiliation:
Madison, USA
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Abstract

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We discuss the recent detection of a strong, organized magnetic field in the bright, broad-line B2V star, HD 142184, using the ESPaDOnS spectropolarimeter on the CFHT as part of the Magnetism in Massive Stars (MiMeS) survey. We find a rotational period of 0.50833 days, making it the fastest-rotating, non-degenerate magnetic star ever detected. Like the previous rapid-rotation record holder HR 7355 (also discovered by MiMeS: Oksala et al. 2010, Rivinius et al. 2010), this star shows emission line variability that is diagnostic of a structured magnetosphere.

Keywords

techniques: spectroscopicstars: magnetic fieldsstars: individual (HD 142184)

References

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