Joint Constraints on Exoplanetary Orbits from Gaia DR3 and Doppler Data
arXiv:2209.05516 · doi:10.3847/1538-3881/ac9126
Abstract
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 the 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 4 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 binary star. The joint Gaia-Doppler analysis shows the secondary mass to be 0.215 +/- 0.013 Msun and the orbital inclination to be 3.63 +/- 0.06 degrees.
22 pages, 15 figures, to appear in AJ
References in corpus (7)
- Accurate, Empirical Radii and Masses of Planets and their Host Stars with Gaia Parallaxes
- Astrometric exoplanet detection with Gaia
- Stellar Parameters and Metallicities of Stars Hosting Jovian and Neptunian Mass Planets: A Possible Dependence of Planetary Mass on Metallicity
- The HARPS search for southern extra-solar planets XVII. Six long-period giant planets around BD -17 0063, HD 20868, HD 73267, HD 131664, HD 145377, HD 153950
- Elodie metallicity-biased search for transiting Hot Jupiters IV. Intermediate period planets orbiting the stars HD43691 and HD132406
- Determining the mass of the planetary candidate HD 114762 b using Gaia
- A possible long-term activity cycle for ι Horologii: First results from the HKα & SPI-HKα projects
Cited by in corpus (3)
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- A dynamical mass for GJ 463 b: A massive super-Jupiter companion beyond the snow line of a nearby M dwarf
- Gaia Astrometry and MIKE+PFS Doppler Data Joint Analysis Reveals that HD 175167b is a Massive Cold Jupiter