Distinguishing exoplanet companions from field stars in direct imaging using Gaia astrometry
Philipp Herz,
Matthias Samland,
Coryn A. L. Bailer-Jones
Abstract:Direct imaging searches for exoplanets around stars detect many spurious candidates that are in fact background field stars.
To help distinguish these from genuine companions, multi-epoch astrometry can be used to identify a common proper motion with the host star. Although this is frequently done, many approaches lack an appropriate model for the motions of the background population, or do not use a statistical framework to properly quantify the results.
For this study we used Gaia astrometry combined with 2M… Show more
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