MiMeS合作发现最快速旋转、非简并、磁性大质量恒星
Discovery of the most rapidly-rotating, non-degenerate, magnetic massive star by the MiMeS collaboration
摘要:
我们讨论了最近检测到的一个强大的,有组织的磁场在明亮的,宽线B2V星,HD 142184,使用ESPaDONS分光偏振仪CFHT的大质量恒星(MiMeS)调查的磁性的一部分。我们发现它的自转周期为0.50833天,这使它成为迄今为止发现的自转最快的非简并磁星。像之前的快速旋转记录保持者HR 7355(也是由MiMeS发现的:Oksala et al. 2010,Rivinius et al. 2010)一样,这颗恒星的发射线变化是结构化磁层的诊断。
英文摘要:
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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