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Paper: Discovery of a Centrifugal Magnetosphere around the He-Strong Magnetic B1 Star ALS 3694
Volume: 506, Bright Emissaries: Be Stars as Messengers of Star-Disk Physics
Page: 305
Authors: Shultz, M.; Wade, G.; Rivinius, T.; Sikora, J.; MiMeS Collaboration
Abstract: We report the results of 6 nights of Canada-France-Hawaii Telescope spectropolarimetric ESPaDOnS observations of the He-strong, magnetic B1 type star ALS 3694. The longitudinal magnetic field is approximately 2 kG in all 6 observations, showing essentially no variation between nights. The Hα line displays variable emission on all nights, peaking at high velocities (∼3v sin i). Given the presence of a strong (Bd>6 kG) magnetic field, and the similarity of the emission profile to that of other magnetic B-type stars, we interpret the emission as a consequence of a centrifugal magnetosphere.
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