由PHASES差分天体测量和视向速度研究四星系统88 Tau A的轨道
The orbits of the quadruple star system 88 Tau A from PHASES differential astrometry and radial velocity
摘要：
我们使用了Palomar高精度天体测量搜索系外行星系统项目的高精度差分天体测量和涵盖20年时间跨度的径向速度测量来确定88 Tau A系统的轨道参数。金牛座88是一个复杂的多星系统，共有6颗恒星;我们研究了其中最亮的4颗，由两对短周期恒星组成，它们的轨道周期为18年。我们提出的第一个轨道解的短周期对之一，并确定组件的质量和距离系统的百分之几的水平。此外，我们的天体测量使我们能够首次确定轨道的相互倾斜。我们发现子系统是不共面的。
英文摘要：
We have used high precision differential astrometry from the Palomar High-precision Astrometric Search for Exoplanet Systems (PHASES) project and radial velocity measurements covering a time-span of 20 years to determine the orbital parameters of the 88 Tau A system. 88 Tau is a complex hierarchical multiple system comprising a total of six stars; we have studied the brightest 4, consisting of two short-period pairs orbiting each other with an 18-year period. We present the first orbital solution for one of the short-period pairs, and determine the masses of the components and distance to the system to the level of a few percent. In addition, our astrometric measurements allow us to make the first determination of the mutual inclinations of the orbits. We find that the sub-systems are not coplanar.
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