SIMBAD references

Stellar companions impact many facets of planet formation and mature planetary systems. In this note, we investigate planet-hosting stars that are currently potential targets for the upcoming Ariel mission, and present an inventory of their stellar companions. We examine several catalogs that used Gaia astrometry to identify companions with similar phase-space parameters, and that therefore have a high probability of being gravitationally bound. The agreement between catalogs is good; the false-negative rate is ∼16%. We also search for stellar companions beyond 1 kpc and present four new candidate companions. All Gaia-resolved companions referenced in this work have now been added to the ExoFOP archive to facilitate future planet confirmation efforts.