发现第一个tau Sco类似物：HD 6665和HD 63425
Discovery of the first tau Sco analogues: HD 66665 and HD 63425
摘要：
B0.2 V磁星Tau Sco由于其高X射线活动，独特的风诊断和高度复杂的磁场而从大质量OB星中脱颖而出。本文介绍了头两个tau Sco类似物- HD 66665和HD 63425的发现，通过它们的紫外光谱与tau Sco的惊人相似性来鉴定。ESPaDOnS的分光偏振观测是由大质量恒星的磁性CFHT大型计划保证的，目的是描述这些恒星的恒星和磁性。CMFGEN模拟的光学ESPaDONS光谱和存档的IUE紫外光谱表明，这些恒星的恒星参数类似于Tau Sco。在两颗恒星上都发现了表面强度相似的磁场，加强了磁场的存在与风的特性之间的联系。然而，为了评估磁场的潜在复杂性，并验证风异常是否与此属性有关，还需要进行额外的相位分辨观测。
英文摘要：
The B0.2 V magnetic star tau Sco stands out from the larger population of massive OB stars due to its high X-ray activity, peculiar wind diagnostics and highly complex magnetic field. This paper presents the discovery of the first two tau Sco analogues - HD 66665 and HD 63425, identified by the striking similarity of their UV spectra to that of tau Sco. ESPaDOnS spectropolarimetric observations were secured by the Magnetism in Massive Stars CFHT Large Program, in order to characterize the stellar and magnetic properties of these stars. CMFGEN modelling of optical ESPaDOnS spectra and archived IUE UV spectra showed that these stars have stellar parameters similar to those of tau Sco. A magnetic field of similar surface strength is found on both stars, reinforcing the connection between the presence of a magnetic field and wind peculiarities. However, additional phase-resolved observations will be required in order to assess the potential complexity of the magnetic fields, and verify if the wind anomalies are linked to this property.
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