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首页> 外文期刊>Astronomy and astrophysics >V945?Centauri =?HD?112409: a bright hot short-period binary in a triple system?
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V945?Centauri =?HD?112409: a bright hot short-period binary in a triple system?

机译：V945？Centauri =？HD？112409：三重系统中明亮的短周期二进制？

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摘要

A detailed analysis of multicolour Geneva photometry andhigh-resolution echelle spectroscopy of the B8.5V star V945 Cen(HD112409,)whose short-term periodic variability was first detectedfrom the HIPPARCOS data, led to the finding that the object isan ellipsoidal variable and a close double-lined spectroscopicbinary with a 06496 orbital period and acircular orbit.The components have spectral types B7 and B8.5 andare both main-sequence objects. The system is detached but closeto a contact configuration and is observed at an inclination of23-24.A notable finding is that the optical spectrumalso contains a third system of spectral lines corresponding to a lateBspectral type that remained stationary during the 5 days of spectralobservations. From several independent lines of reasoning, wetentativelyconclude that the third spectrum belongs to a real third body in thesystem.However, the possibility that it instead originates in circumbinary gascannotbe excluded completely, and additional spectral and interferometricobservations are required to help us determine its origin conclusively.Key words: binaries: close - stars:variables: general - stars: individual: V945Cen =HD112409
机译：详细分析了B8.5V星V945 Cen（HD112409）的日内瓦色光度法和高分辨率阶梯光谱，该光谱首先从HIPPARCOS数据中检测到其短期周期性变化，从而发现该物体是椭球变量，并且接近双线性光谱双星，具有06496的轨道周期和非圆形的轨道。分量的光谱类型分别为B7和B8.5，都是主要序列对象。该系统是分离的但接近接触构型，并且以23-24的倾斜度观察到。一个显着的发现是，光谱还包含对应于LateB光谱类型的光谱线的第三系统，该光谱系统在5天的光谱观测中保持稳定。从几条独立的推理路线中，我们努力地得出结论认为第三光谱属于系统中的真实第三体，但是，不能完全排除第三光谱起源于环境气体的可能性，还需要进行其他光谱和干涉测量观察以帮助我们最终确定其起源。关键词：二进制文件：关闭-星级：变量：常规-星级：个人：V945Cen = HD112409

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