Joint Constraints on Exoplanetary Orbits from Gaia DR3 and Doppler Data

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.

arXiv comment22 pages, 15 figures, to appear in AJ

References in corpus (24)

• emcee: The MCMC Hammer
• Intrinsic Colors, Temperatures, and Bolometric Corrections of Pre-Main Sequence Stars
• Gaia Early Data Release 3: The astrometric solution
• The metal-rich nature of stars with planets
• The LCES HIRES/Keck Precision Radial Velocity Exoplanet Survey
• Accurate, Empirical Radii and Masses of Planets and their Host Stars with Gaia Parallaxes
• Astrometric exoplanet detection with Gaia
• The CORALIE survey for southern extra-solar planets. XII. Orbital solutions for 16 extra-solar planets discovered with CORALIE
• Stellar Parameters and Metallicities of Stars Hosting Jovian and Neptunian Mass Planets: A Possible Dependence of Planetary Mass on Metallicity
• A Mass for the Extrasolar Planet Gl 876b Determined from Hubble Space Telescope Fine Guidance Sensor 3 Astrometry and High-Precision Radial Velocities
• A public HARPS radial velocity database corrected for systematic errors
• SWEET-Cat 2.0: The Cat just got SWEETer; Higher quality spectra and precise parallaxes from GAIA eDR3
• The CORALIE survey for southern extrasolar planets V: 3 new extrasolar planets
• The Anglo-Australian Planet Search. XXII. Two New Multi-Planet Systems
• Deep exploration of the planets HR 8799 b, c, and d with moderate resolution spectroscopy
• Low Mass Companions for Five Solar-Type Stars from the Magellan Planet Search Program
• Five Long-period Extrasolar Planets in Eccentric orbits from the Magellan Planet Search Program
• 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
• Multi-wavelength variability of the young solar analog iota Hor. X-ray cycle, star spots, flares, and UV emission
• Revised Orbit and Transit Exclusion for HD 114762b
• A Massive Planet to the Young Disc Star HD 81040
• 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 (14)

• Hunting for exoplanets via magnetic star-planet interactions: geometrical considerations for radio emission
• Spectroscopic follow-up of Gaia exoplanet candidates: Impostor binary stars invade the Gaia DR3 astrometric exoplanet candidates
• Exploring the Brown Dwarf Desert with Precision Radial Velocities and Gaia DR3 Astrometric Orbits
• A dynamical mass for GJ 463 b: A massive super-Jupiter companion beyond the snow line of a nearby M dwarf
• Prospects from TESS and Gaia to constrain the flatness of planetary systems
• Dark Exoplanets
• The SPHERE infrared survey for exoplanets (SHINE). V. Complete observations, data reduction and analysis, detection performances, and final results
• The NEID Earth Twin Survey. II. Dynamical Masses in Seven High-acceleration Star Systems
• Relative Occurrence Rate Between Hot and Cold Jupiters as an Indicator to Probe Planet Migration
• Dancing with invisible partners: Three-body exchanges with primordial black holes
• Searching for substellar companion candidates with Gaia. II. A catalog of 9,698 planet candidate solar-type hosts
• Machine learning-based identification of Gaia astrometric exoplanet orbits
• Gaia Astrometry and MIKE+PFS Doppler Data Joint Analysis Reveals that HD 175167b is a Massive Cold Jupiter
• A Planetary Illusion's Funeral: Non-detection of a Gaia DR3 Exoplanet Candidate, and the Role of Intermediate-precision Radial Velocities in Gaia Exoplanet Follow-up