Twenty multiple stellar systems with solar-type primaries were observed at high angular resolution using the PALM-3000 adaptive optics system at the 5 m Hale telescope. The goal was to complement the knowledge of hierarchical multiplicity in the solar neighborhood by confirming recent discoveries by the visible Robo-AO system with new near-infrared observations with PALM-3000. The physical status of most, but not all, of the new pairs is confirmed by photometry in the Ks band and new positional measurements. In addition, we resolved for the first time five close sub-systems: the known astrometric binary in HIP 17129AB, companions to the primaries of HIP 33555, and HIP 118213, and the companions to the secondaries in HIP 25300 and HIP 101430. We place the components on a color–magnitude diagram and discuss each multiple system individually.
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机译：在5 m Hale望远镜上使用PALM-3000自适应光学系统以高角度分辨率观察到二十个具有太阳型原色的多星系统。目的是通过用可见光Robo-AO系统用PALM-3000的新近红外观测结果确认最近的发现，来补充太阳邻域中的分层多重性知识。通过对Ks波段的测光法和新的位置测量，可以确认大多数（而不是全部）新对的物理状态。此外，我们首次解析了五个封闭的子系统：HIP 17129AB中的已知天文二进制文件，HIP 33555和HIP 118213的主要同伴，以及HIP 25300和HIP 101430的辅助的同伴。彩色图表上的组件，并分别讨论每个多个系统。
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