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

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

2010-09-16

arxiv.org/abs/1009.3246v1

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

2 pages, 2 figures, IAUS272 - Active OB Stars: Structure, Evolution, Mass Loss and Critical Limits

Scientific paper

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.

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