• DOI:10.3847/2515-5172/ac488e
• Corpus ID: 245811830

Resolving the Multiplicity of Exoplanet Host Stars in Gemini/NIRI Data

@article{Miskovetz2022ResolvingTM,
  title={Resolving the Multiplicity of Exoplanet Host Stars in Gemini/NIRI Data},
  author={Kim Miskovetz and Trent J. Dupuy and Jessica Schonhut-Stasik and Keivan G. Stassun},
  journal={Research Notes of the AAS},
  year={2022},
  volume={6}
}

• Kim Miskovetz, T. Dupuy, +1 author K. Stassun
• Published 7 January 2022
• Physics, Geology
• Research Notes of the AAS

The majority of stars have one or more stellar companions. As exoplanets continue to be discovered, it is crucial to examine planetary systems to identify their stellar companions. By observing a change in proper motion, companions can be detected by the acceleration they induce on their host stars. We selected 701 stars from the Hipparcos–Gaia Catalog of Accelerations (HGCA) that have existing adaptive optics imaging data gathered with Gemini/Near InfraRed Imager (NIRI). Of these, we examined 21 stars known to host planet candidates and reduced their archival NIRI data with Gemini’s DRAGONS software. We assessed these systems for companions using the NIRI images as well as Renormalized Unit Weight Error values in Gaia and accelerations in the HGCA. We detected three known visible companions and found two more systems with no visible companions but astrometric measurements indicating likely unresolved companions.