Multiplicity of stars with planets in the solar neighbourhood

Abstract

- Aims: We intended to quantify the impact of stellar multiplicity on the presence and properties of exoplanets. - Methods: We investigated all exoplanet host stars at less than 100 pc using the latest astrometric data from Gaia DR3 and advanced statistical methodologies. We complemented our search for common proper motion and parallax companions with data from the Washington Double Star catalogue and the literature. After excluding a number of systems based on radial velocity data, and membership in clusters and open associations, or with resolved ultracool companions, we kept 215 exoplanet host stars in 212 multiple-star systems. - Results: We found 17 new companions in the systems of 15 known exoplanet host stars, measured precise angular and projected physical separations and position angles for 236 pairs of stars, compiled key parameters for 276 planets in multiple systems, and established a comparison sample comprising 687 single stars with exoplanets. With all of this, we statistically analysed a series of hypothesis regarding planets in multiple stellar systems. Although they are only statistically significant at a 2σ level, our analysis pointed to several interesting results on the comparison in the mean number of planets in multiple versus single stellar systems and the tendency of high mass planets to be located in closer orbits in multiple systems. We confirm that planets in multiple systems tend to have orbits with larger eccentricities than those in single systems. In particular, we found a significant (> 4σ) preference for planets to exhibit high orbital eccentricities at small ratios between star-star projected physical separations and star-planet semi-major axes.

Accepted in A&A. 47 Pages, 14 figures and 9 tables (4 tables online)

References in corpus (69)

• The Radial Velocity Experiment (RAVE): first data release
• Optical Images of an Exosolar Planet 25 Light Years from Earth
• One or more bound planets per Milky Way star from microlensing observations
• The High Angular Resolution Multiplicity of Massive Stars
• Contributions to the Nearby Stars (NStars) Project: Spectroscopy of Stars Earlier than M0 within 40 parsecs: The Southern Sample
• The Radial Velocity Experiment (RAVE): Fifth Data Release
• Tertiary companions to close spectroscopic binaries
• The Kepler Follow-Up Observation Program. I. A Catalog of Companions to Kepler Stars from High-Resolution Imaging
• A Stellar Census of the Tucana-Horologium Moving Group
• The Solar Neighborhood XLV. The Stellar Multiplicity Rate of M Dwarfs Within 25 pc
• Two Suns in The Sky: Stellar Multiplicity in Exoplanet Systems
• CARMENES input catalogue of M dwarfs. I. Low-resolution spectroscopy with CAFOS
• Comparative statistics and origin of triple and quadruple stars
• A Giant Planet Candidate Transiting a White Dwarf
• The CARMENES search for exoplanets around M dwarfs -- Planet occurrence rates from a subsample of 71 stars
• A Survey for Spectroscopic Binaries Among Very Low-Mass Stars
• The M-dwarfs in Multiples (MinMs) survey - I. Stellar multiplicity among low-mass stars within 15 pc
• Terrestrial Planet Formation Surrounding Close Binary Stars
• The frequency of planets in multiple systems
• BANYAN. V. A Systematic All-Sky Survey for New Very Late-Type Low-Mass Stars and Brown Dwarfs in Nearby Young Moving Groups
• High eccentricity planets from the Anglo-Australian Planet Search
• CARMENES input catalogue of M dwarfs II. High-resolution imaging with FastCam
• SPECULOOS -- Ultracool Dwarf Transit Survey: Target List and Strategy
• Finding benchmark brown dwarfs to probe the IMF as a function of time
• 3-D selection of 167 sub-stellar companions to nearby stars
• The CORALIE survey for southern extra-solar planets XV. Discovery of two eccentric planets orbiting HD4113 and HD156846
• The CARMENES search for exoplanets around M dwarfs. Guaranteed time observations Data Release 1 (2016-2020)
• LACEwING: A New Moving Group Analysis Code
• Speckle Observations of TESS Exoplanet Host Stars. II. Stellar Companions at 1-1000 AU and Implications for Small Planet Detection
• Direct detection of exoplanet host star companion gamma Cep B and revised masses for both stars and the sub-stellar object
• The multiplicity of exoplanet host stars - New low-mass stellar companions of the exoplanet host stars HD125612 and HD212301
• Understanding the Impacts of Stellar Companions on Planet Formation and Evolution: A Survey of Stellar and Planetary Companions within 25 pc
• A high binary fraction for the most massive close-in giant planets and brown dwarf desert members
• Optimal Survey Strategies and Predicted Planet Yields for the Korean Microlensing Telescope Network
• SPIRou Input Catalog: Activity, Rotation and Magnetic Field of Cool Dwarfs
• A stellar companion in the HD 189733 system with a known transiting extrasolar planet
• MONOS: Multiplicity Of Northern O-type Spectroscopic systems. I. Project description and spectral classifications and visual multiplicity of previously known objects
• Chemical (in)homogeneity and atomic diffusion in the open cluster M67
• A catalogue of stellar diameters and fluxes for mid-infrared interferometry
• The CARMENES search for exoplanets around M dwarfs - HD 147379b: A nearby Neptune in the temperate zone of an early-M dwarf
• The multiplicity of exoplanet host stars - Spectroscopic confirmation of the companions GJ3021B and HD27442B, one new planet host triple-star system, and global statistics
• Multiple Stellar Evolution: a population synthesis algorithm to model the stellar, binary, and dynamical evolution of multiple-star systems
• Spatially resolved imaging of the inner Fomalhaut disk using JWST/MIRI
• The Gaia Ultra-Cool Dwarf Sample -- II: Structure at the end of the main sequence
• A wide-orbit giant planet in the high-mass b Centauri binary system
• New HST data and modeling reveal a massive planetesimal collision around Fomalhaut
• A Lucky Imaging search for stellar companions to transiting planet host stars
• The multiplicity of planet host stars - New low-mass companions to planet host stars
• A Closer Look at Exoplanet Occurrence Rates: Considering the Multiplicity of Stars Without Detected Planets
• The Magellan PFS Planet Search Program: Radial Velocity and Stellar Abundance Analyses of the 360 AU, Metal-Poor Binary "Twins" HD 133131A & B
• The widest ultracool binary
• The Overlooked Potential of Generalized Linear Models in Astronomy - I: Binomial Regression
• Cool Subdwarf Investigations II: Multiplicity
• Frequency of Planets in Binaries
• The Masses of a Sample of Radial-Velocity Exoplanets with Astrometric Measurements
• The Lyot Project Direct Imaging Survey of Substellar Companions: Statistical Analysis and Information from Nondetections
• TOI-3235 b: a transiting giant planet around an M4 dwarf star
• Determining the mass of the planetary candidate HD 114762 b using Gaia
• HD 202206 : A Circumbinary Brown Dwarf System
• An ablating super-Earth in an eccentric binary from the Dispersed Matter Planet Project
• A Search for wide visual companions of exoplanet host stars - The Calar Alto Survey
• The TOI-763 system: sub-Neptunes orbiting a Sun-like star
• The CARMENES search for exoplanets around M dwarfs: Spectroscopic orbits of nine M-dwarf multiple systems, including two triples, two brown dwarf candidates, and one close M-dwarf-white dwarf binary
• K2-288Bb: A Small Temperate Planet in a Low-mass Binary System Discovered by Citizen Scientists
• A Distance-Limited Imaging Survey of Sub-Stellar Companions to Solar Neighborhood Stars
• Speckle Imaging Characterization of Radial Velocity Exoplanet Systems
• Dynamical masses for two M1 + mid-M dwarf binaries monitored during the SPHERE-SHINE survey
• The $\text{Gaia}$ Ultra-Cool Dwarf Sample $-$ III: Seven new multiple systems containing at least one $\text{Gaia}$ DR2 ultra-cool dwarf
• A photospheric and chromospheric activity analysis of the quiescent retrograde-planet host $\nu$ Octantis A