TY - JOUR
T1 - Joint Constraints on Exoplanetary Orbits from Gaia DR3 and Doppler Data
AU - Winn, Joshua N.
N1 - Funding Information:
This work would not have been possible without the hard work over many years of the Gaia team, who have delivered a data set with a breathtaking scope of applications. The author is also grateful to the anonymous referee for a timely and helpful report, and to D. Foreman-Mackey for his development of the emcee and corner Python codes. This work has made use of data from the European Space Agency (ESA) mission Gaia (https://www.cosmos.esa.int/gaia), processed by the Gaia Data Processing and Analysis Consortium (DPAC, https://www.cosmos.esa.int/web/gaia/dpac/consortium). Funding forthe DPAC has been provided by national institutions, in particular the institutions participating in the Gaia Multilateral Agreement. This research also made use of the NASA Exoplanet Archive (2019), which is operated by the California Institute of Technology, under contract with the National Aeronautics and Space Administration under the Exoplanet Exploration Program.
Publisher Copyright:
© 2022. The Author(s). Published by the American Astronomical Society.
PY - 2022/11/1
Y1 - 2022/11/1
N2 - The third Gaia data release includes a catalog of exoplanets and exoplanet candidates identified via the star’s astrometric motion. This paper reports on tests for consistency between the Gaia two-body orbital solutions and precise Doppler velocities for stars currently amenable to such a comparison. For BD-17 0063, HD 81040, and HD 132406, the Gaia orbital solution and the Doppler data were found to be consistent and were fitted jointly to obtain the best possible constraints on the planets’ orbits and masses. Inconsistencies were found for four stars: HD 111232, probably due to additional planets that were not included in the astrometric model; HD 175167 and HR 810, possibly due to inaccurate treatment of non-Gaussian uncertainties in the Gaia orbital solutions; and HIP 66074, for unknown reasons. Consistency tests were also performed for HD 114762, which was reported in 1989 to have a brown dwarf or exoplanet but has since been shown to be a binary star. The joint Gaia-Doppler analysis shows the secondary mass to be 0.215 ± 0.013 M ⊙ and the orbital inclination to be 3.°63 ± 0.°06.
AB - The third Gaia data release includes a catalog of exoplanets and exoplanet candidates identified via the star’s astrometric motion. This paper reports on tests for consistency between the Gaia two-body orbital solutions and precise Doppler velocities for stars currently amenable to such a comparison. For BD-17 0063, HD 81040, and HD 132406, the Gaia orbital solution and the Doppler data were found to be consistent and were fitted jointly to obtain the best possible constraints on the planets’ orbits and masses. Inconsistencies were found for four stars: HD 111232, probably due to additional planets that were not included in the astrometric model; HD 175167 and HR 810, possibly due to inaccurate treatment of non-Gaussian uncertainties in the Gaia orbital solutions; and HIP 66074, for unknown reasons. Consistency tests were also performed for HD 114762, which was reported in 1989 to have a brown dwarf or exoplanet but has since been shown to be a binary star. The joint Gaia-Doppler analysis shows the secondary mass to be 0.215 ± 0.013 M ⊙ and the orbital inclination to be 3.°63 ± 0.°06.
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U2 - 10.3847/1538-3881/ac9126
DO - 10.3847/1538-3881/ac9126
M3 - Article
AN - SCOPUS:85141276760
SN - 0004-6256
VL - 164
JO - Astronomical Journal
JF - Astronomical Journal
IS - 5
M1 - 196
ER -