Searching for substellar companion candidates with Gaia. III. Search for companions to members of young associations
A.-M. Lagrange, F. Kiefer, P. Rubini, V. Squicciarini, A. Chomez, J., Milli, A. Zurlo, J. Bouvier, P. Delorme, H. Beust, J. Mazoyer, O. Flasseur,, N. Meunier, L. Mignon, G. Chauvin, and P. Palma-Bifani

TL;DR
This paper evaluates Gaia's astrometric capabilities for detecting and characterizing substellar companions, combining Gaia data with direct imaging and RV measurements, and reports new detections and confirmations of exoplanets and brown dwarfs.
Contribution
It introduces GaiaPMEX, a new tool for analyzing Gaia data to detect and characterize substellar companions, and applies it to identify and confirm several exoplanets and brown dwarfs.
Findings
Detection of a new giant planet around G80-21
Confirmation of substellar companions to AB Pic and HD 14082 B
Identification of 9 planetary mass candidates
Abstract
Absolute astrometry with Gaia is expected to detect and characterize the orbits of thousands of exoplanets in the coming years. A tool, GaiaPMEX, was recently developed to characterize multiple systems based on Gaia-only data, and, when possible, the Gaia-Hipparcos proper motion anomaly. We compare the detection capabilities of absolute astrometry and spectroscopy (RV), and to detect and characterize planetary-mass companions, combining the astrometric data with direct imaging and RV data. For companion masses possibly in the planetary range, we use direct imaging and when possible, RV data as well, to further constrain their nature and orbital properties. For each target, a diagnosis on its binarity based on absolute astrometry is given. When no binary is detected, we provides detection limits in the (sma, mass) space. We identify several companions with possible masses down to the…
Peer Reviews
No public reviews on file for this paper yet. If you reviewed it on a platform where reviews are public (OpenReview, ICLR, NeurIPS, ICML), you can paste yours below so the community can read it here.
Videos
No videos yet. Explain this paper in a talk, walkthrough, or lecture? Add one.
Taxonomy
TopicsAstro and Planetary Science · Stellar, planetary, and galactic studies · Astronomy and Astrophysical Research
