ABSTRACT

This study focuses on periodic variations of radial velocities (RVs) after removing the orbital motion of 33 spectroscopic binaries. The RVs were monitored from 2003 to 2012 and published in Katoh et al. (2013, AJ, 145, 41). Their RV precision was determined to be ∼10 m s⁻¹ utilizing an I₂ cell. We investigated the periodic variation using a generalzied Lomb–Scargle algorithm and found periodic variations in the residual velocities of seven binary systems. The residual-velocity variations are mostly generated by stellar activity rather than the orbital motion of a possible companion. For eight binaries, we found significant evidence of a second signal, with velocity dispersions greater than three times the RV uncertainty. We find these residual-velocity variations inconsistent with a Doppler signal induced by the orbital motion of an unknown component. For the remaining 18 binaries, we did not detect significant variations of residual-velocity.

中文翻译：

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在去除光谱双星的轨道运动后搜索径向速度的周期性变化

摘要

这项研究的重点是去除33个光谱双星的轨道运动后径向速度（RVs）的周期性变化。从2003年到2012年对RV进行了监测，并在Katoh等人的文章中发表。（2013，AJ，145，41）。使用I ₂可以确定其RV精度为〜10 m s ^-1细胞。我们使用广义Lomb-Scargle算法研究了周期变化，并发现了七个二元系统的残余速度中的周期变化。残余速度变化主要是由恒星活动而不是可能的伴星的轨道运动产生的。对于八个二进制文件，我们发现了第二个信号的明显证据，其速度色散大于RV不确定度的三倍。我们发现这些残余速度变化与由未知分量的轨道运动引起的多普勒信号不一致。对于其余18个二进制文件，我们没有检测到残余速度的显着变化。