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Twenty multiple stellar systems with solar-type primaries were observed athigh angular resolution using the PALM-3000 adaptive optics system at the 5 mHale telescope. The goal was to complement the knowledge of hierarchicalmultiplicity in the solar neighborhood by confirming recent discoveries by thevisible Robo-AO system with new near-infrared observations with PALM-3000. Thephysical status of most, but not all, of the new pairs is confirmed byphotometry in the Ks band and new positional measurements. In addition, weresolved for the first time five close sub-systems: the known astrometricbinary in HIP 17129AB, companions to the primaries of HIP 33555, and HIP118213, and the companions to the secondaries in HIP 25300 and HIP 101430. Weplace the components on a color-magnitude diagram and discuss each multiplesystem individually.

Observations of Hierarchical Solar-Type Multiple Star Systems