The NEID Earth Twin Survey. II. Dynamical Masses in Seven High-acceleration Star Systems
arXiv:2505.12563 · doi:10.3847/1538-3881/add922
Abstract
We present a set of companion dynamical masses and orbital parameters of seven star systems from the NEID Earth Twin Survey with significant absolute astrometric accelerations between the epochs of Hipparcos and Gaia. These include four binary star systems (HD 68017 AB, 61 Cygni AB, HD 24496 AB, and HD 4614 AB) and three planetary systems (HD 217107, HD 190360, and HD 154345). Our analyses incorporate a long baseline of RVs that includes over 1100 previously unpublished measurements from NEID and MINERVA, extending the overall RV baseline for each system by 2.5 years, as well as relative astrometry for the stellar binary systems where the positions of both stars are well-measured. In each case, the combination of astrometry and RVs constrains the three-dimensional acceleration of the host star and enables precise dynamical masses. We publish true masses for three planets whose measurements were previously entangled with their inclinations, four stellar masses with 1% relative precision, and improved orbital solutions for all seven systems, including the first for HD 24496 AB. These solutions not only agree with previous estimates, but also improve their fidelity. We also explore each system for evidence of periodic signals in the residuals around our best-fit models, and discuss the potential that the three planetary systems have for being directly imaged. With dynamical mass estimates and reliable orbit ephemerides, these seven star systems represent promising benchmarks for future stellar and planetary characterization efforts, and are amenable for further improvement with the upcoming release of Gaia epoch astrometry.
arXiv comment42 pages, 28 figures, 7 tables
References in corpus (75)
- Astropy: A Community Python Package for Astronomy
- emcee: The MCMC Hammer
- Gaia Data Release 2. Summary of the contents and survey properties
- The Astropy Project: Building an inclusive, open-science project and status of the v2.0 core package
- The Gaia mission
- The Astropy Project: Sustaining and Growing a Community-oriented Open-source Project and the Latest Major Release (v5.0) of the Core Package
- Gaia Data Release 3: Summary of the content and survey properties
- The Transiting Exoplanet Survey Satellite
- MESA Isochrones and Stellar Tracks (MIST). I: Solar-Scaled Models
- Gaia Data Release 2: The astrometric solution
- The James Webb Space Telescope
- MESA Isochrones and Stellar Tracks (MIST) 0: Methods for the construction of stellar isochrones
- A Survey of Stellar Families: Multiplicity of Solar-Type Stars
- A large stellar evolution database for population synthesis studies. I. Scaled solar models and isochrones
- Improved Age Estimation for Solar-Type Dwarfs Using Activity-Rotation Diagnostics
- Catalog of Nearby Exoplanets
- How to Constrain Your M Dwarf: measuring effective temperature, bolometric luminosity, mass, and radius
- A large stellar evolution database for population synthesis studies. II. Stellar models and isochrones for an alpha-enhanced metal distribution
- Chromospheric CaII Emission in Nearby F, G, K, and M stars
- First Results from the CHARA Array. II. A Description of the Instrument
- Accurate, Empirical Radii and Masses of Planets and their Host Stars with Gaia Parallaxes
- A million binaries from Gaia eDR3: sample selection and validation of Gaia parallax uncertainties
- Structure and Evolution of Nearby Stars with Planets II. Physical Properties of ~1000 Cool Stars from the SPOCS Catalog
- How to Constrain Your M dwarf II: the mass-luminosity-metallicity relation from 0.075 to 0.70
- From binaries to multiples II: hierarchical multiplicity of F and G dwarfs
- The California-Kepler Survey. I. High Resolution Spectroscopy of 1305 Stars Hosting Kepler Transiting Planets
- Dynamic temperature selection for parallel-tempering in Markov chain Monte Carlo simulations
- The Hipparcos-Gaia Catalog of Accelerations: Gaia EDR3 Edition
- Thermohaline instability and rotation-induced mixing. III - Grid of stellar models and asymptotic asteroseismic quantities from the pre-main sequence up to the AGB for low- and intermediate-mass stars at various metallicities
- Stellar Diameters and Temperatures III. Main Sequence A, F, G, & K Stars: Additional high-precision measurements and empirical relations
- The Hipparcos-Gaia Catalog of Accelerations
- Stellar Diameters and Temperatures I. Main Sequence A, F, & G Stars
- From binaries to multiples I: Data on F and G dwarfs within 67 pc of the Sun
- Precise Dynamical Masses of Directly Imaged Companions from Relative Astrometry, Radial Velocities, and Hipparcos-Gaia DR2 Accelerations
- Gaia Data Release 3. Astrometric binary star processing
- Planetary Companions Around Two Solar Type Stars: HD 195019 and HD 217107
- orvara: An Efficient Code to Fit Orbits using Radial Velocity, Absolute, and/or Relative Astrometry
- Correcting HIRES radial velocities for small systematic errors
- The Solar Neighborhood XLIV: RECONS Discoveries within 10 Parsecs
- CHARA Array Measurements of the Angular Diameters of Exoplanet Host Stars
- The CORALIE survey for southern extrasolar planets V: 3 new extrasolar planets
- A comprehensive radial velocity error budget for next generation Doppler spectrometers
- Long-Period Objects in the Extrasolar Planetary Systems 47 UMa and 14 Her
- A solar-like magnetic cycle on the mature K-dwarf 61 Cyg A (HD 201091)
- Miniature Exoplanet Radial Velocity Array (MINERVA) I. Design, Commissioning, and First Science Results
- Understanding the Impacts of Stellar Companions on Planet Formation and Evolution: A Survey of Stellar and Planetary Companions within 25 pc
- The Jupiter Twin HD 154345b
- The radii of the nearby K5V and K7V stars 61 Cyg A & B - CHARA/FLUOR interferometry and CESAM2k modeling
- Improved Dynamical Masses for Six Brown Dwarf Companions Using Hipparcos and Gaia EDR3
- The TRENDS High-Contrast Imaging Survey. I. Three Benchmark M-dwarfs Orbiting Solar-type Stars
- Detecting stars, galaxies, and asteroids with Gaia
- Population synthesis to constrain Galactic and Stellar Physics- I- Determining age and mass of thin-disc red-giant stars
- The SOPHIE search for northern extrasolar planets. V. Follow-up of ELODIE candidates: Jupiter-analogs around Sun-like stars
- Rotation periods of exoplanet host stars
- Disks in the Arches cluster -- survival in a starburst environment
- The ELODIE survey for northern extra-solar planets II. A Jovian planet on a long-period orbit around GJ 777 A
- TOI-3714 b and TOI-3629 b: Two gas giants transiting M dwarfs confirmed with HPF and NEID
- Target Prioritization and Observing Strategies for the NEID Earth Twin Survey
- Joint Constraints on Exoplanetary Orbits from Gaia DR3 and Doppler Data
- The Masses of a Sample of Radial-Velocity Exoplanets with Astrometric Measurements
- Optimized modeling of Gaia-Hipparcos astrometry for the detection of the smallest cold Jupiter and confirmation of seven low mass companions
- Revised Exoplanet Radii and Habitability Using Gaia Data Release 2
- Determining the mass of the planetary candidate HD 114762 b using Gaia
- Surveying Nearby Brown Dwarfs with HGCA: Direct Imaging Discovery of a Faint, High-Mass Brown Dwarf Orbiting HD 176535 A
- Robo-AO: autonomous and replicable laser-adaptive-optics and science system
- A Mass-Magnitude Relation for Low-mass Stars Based on Dynamical Measurements of Thousands of Binary Star Systems
- The death of Vulcan: NEID reveals the planet candidate orbiting HD 26965 is stellar activity
- The GALAH Survey: Using Galactic Archaeology to Refine our Knowledge of TESS Target Stars
- A High-Eccentricity Warm Jupiter Orbiting TOI-4127
- The complementarity of astrometric and radial velocity exoplanet observations - Determining exoplanet mass with astrometric snapshots
- First radial velocity results from the MINiature Exoplanet Radial Velocity Array (MINERVA)
- K2-HERMES II. Planet-candidate properties from K2 Campaigns 1-13
- Speckle Interferometry at the U.S. Naval Observatory. XXIII
- Speckle Interferometry at the U.S. Naval Observatory. XXII
- The HD 217107 Planetary System: Twenty Years of Radial Velocity Measurements