Spectroscopic orbits of main-sequence stars HIP 3150A, 6873B, 11537A, 22531A, 22534B, 31089B, 49336A, 104833C, and 107731A belonging to eight multiple systems are determined from high-resolution spectra taken with CHIRON. Two of those are twins with mass ratios above 0.95. HIP 11537 is a young three-tier quadruple system with inner periods of 22.3 and 1146 days and the outer period of 3 kyr. HIP 22531 ( ι Pic) is the brightest star in a hierarchical system with six components. It is a spectroscopic binary with periods of 1.56 days and 2.75 yr, as well as a γ Dor variable with a period of 0.67 day, possibly in a 7:3 resonance with the inner orbit. HIP 22534, also member of this system, is a double-lined binary with a period of 208 days. For HIP 31089, both the spectro-interferometric 32 yr outer orbit and the 213 day orbit of the subsystem are determined. HIP 107731 is a triple system with an inner period of 470 days and a fast spatial motion, likely metal-poor. New ...

中文翻译：

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多星子系统的光谱轨道。七。

根据使用CHIRON拍摄的高分辨率光谱确定属于八个多重系统的主序列恒星HIP 3150A，6873B，11537A，22531A，22534B，31089B，49336A，104833C和107731A的光谱轨道。其中两个是质量比高于0.95的双胞胎。HIP 11537是一个年轻的三层四层系统，内部周期为22.3和1146天，外部周期为3 kyr。HIP 22531（I Pic）是具有六个组件的分层系统中最亮的星星。它是一个光谱双星，周期为1.56天和2.75年，以及一个γDor变量，周期为0.67天，可能与内部轨道发生7：3共振。HIP 22534（也是该系统的成员）是双线二进制文件，期限为208天。对于HIP 31089，确定了分光干涉法的32年外轨道和子系统的213天轨道。HIP 107731是一个三重系统，内部周期为470天，并且空间运动快速，可能很贫金属。新...