Interferometric diameters of five evolved intermediate-mass planet-hosting stars measured with PAVO at the CHARA Array

Abstract

Debate over the planet occurrence rates around intermediate-mass stars has hinged on the accurate determination of masses of evolved stars, and has been exacerbated by a paucity of reliable, directly-measured fundamental properties for these stars. We present long-baseline optical interferometry of five evolved intermediate-mass ($\sim 1.5{\mathrm{M}}_{\odot }$) planet-hosting stars using the PAVO beam combiner at the CHARA Array, which we combine with bolometric flux measurements and parallaxes to determine their radii and effective temperatures. We measured the radii and effective temperatures of 6 Lyncis ($5.12\pm 0.16{\mathrm{R}}_{\odot }$, $4949\pm 58\mathrm{K}$), 24 Sextantis ($5.49\pm 0.18{\mathrm{R}}_{\odot }$, $4908\pm 65\mathrm{K}$), $\kappa$ Coronae Borealis ($4.77\pm 0.07{\mathrm{R}}_{\odot }$, $4870\pm 47\mathrm{K}$), HR 6817 ($4.45\pm 0.08{\mathrm{R}}_{\odot }$, $5013\pm 59\mathrm{K}$), and HR 8641 ($4.91\pm 0.12{\mathrm{R}}_{\odot }$, $4950\pm 68\mathrm{K}$). We find disagreements of typically 15 per cent in angular diameter and $\sim$200 K in temperature compared to interferometric measurements in the literature, yet good agreement with spectroscopic and photometric temperatures, concluding that the previous interferometric measurements may have been affected by systematic errors exceeding their formal uncertainties. Modelling based on BaSTI isochrones using various sets of asteroseismic, spectroscopic, and interferometric constraints tends to favour slightly ($\sim$15 per cent) lower masses than generally reported in the literature.

Accepted for publication in Monthly Notices of the Royal Astronomical Society. 11 pages, 13 figures, and 6 tables

References in corpus (32)

• The Transiting Exoplanet Survey Satellite
• A grid of MARCS model atmospheres for late-type stars I. Methods and general properties
• How to Constrain Your M Dwarf: measuring effective temperature, bolometric luminosity, mass, and radius
• The Occurrence and Mass Distribution of Close-in Super-Earths, Neptunes, and Jupiters
• Basic physical parameters of a selected sample of evolved stars
• Standing on the shoulders of Dwarfs: the Kepler asteroseismic LEGACY sample II - radii, masses, and ages
• Asteroseismology and Gaia: Testing Scaling Relations Using 2200 Kepler Stars with TGAS Parallaxes
• A giant planet undergoing extreme ultraviolet irradiation by its hot massive-star host
• Retired A Stars and Their Companions: Exoplanets Orbiting Three Intermediate-Mass Subgiants
• Accurate fundamental parameters for Lower Main Sequence Stars
• Confirming chemical clocks: asteroseismic age dissection of the Milky Way disk(s)
• The Stagger-grid: A grid of 3D stellar atmosphere models - IV. Limb darkening coefficients
• A Planetary Mass Companion to the K0 Giant HD 17092
• HD 181068: A Red Giant in a Triply-Eclipsing Compact Hierarchical Triple System
• CHARA Array Measurements of the Angular Diameters of Exoplanet Host Stars
• No Sun-like dynamo on the active star $\zeta$ Andromedae from starspot asymmetry
• First Results From The Hertzsprung Song Telescope: Asteroseismology Of The G5 Subgiant Star {\Mu}Her
• Retired A Stars and Their Companions II: Jovian planets orbiting kappa Coronae Borealis and HD167042
• Revised Filter Profiles and Zero Points for Broadband Photometry
• Synthetic Stellar Photometry - II. Testing the bolometric flux scale, and tables of bolometric corrections for the Hipparcos/Tycho, Pan-STARRS1, SkyMapper and JWST systems
• KELT-17b: A hot-Jupiter transiting an A-star in a misaligned orbit detected with Doppler tomography
• Fundamental properties of the Population II fiducial stars HD 122563 and Gmb 1830 from CHARA interferometric observations
• Eleven Exoplanet Host Star Angular Diameters from the CHARA Array
• Benchmark stars for Gaia: fundamental properties of the Population II star HD140283 from interferometric, spectroscopic and photometric data
• Accurate effective temperatures of the metal-poor benchmark stars HD 140283, HD 122563 and HD 103095 from CHARA interferometry
• The Physical Parameters of the Retired A Star HD185351
• A planet in an 840-d orbit around a Kepler main-sequence A star found from phase modulation of its pulsations
• The masses of retired A stars with asteroseismology: Kepler and K2 observations of exoplanet hosts
• Asteroseismic masses of retired planet-hosting A-stars using SONG
• The Discovery of Stellar Oscillations in the K Giant $\iota$ Dra
• Testing stellar evolution models with the retired A star HD 185351
• Evidence of asymmetries in the Aldebaran photosphere from multi-wavelength lunar occultations

Cited by in corpus (39)

• Probing the interior physics of stars through asteroseismology
• Angular Momentum Transport in Stellar Interiors
• A Guide to Realistic Uncertainties on Fundamental Properties of Solar-Type Exoplanet Host Stars
• ARIADNE: Measuring accurate and precise stellar parameters through SED fitting
• The GALAH survey: effective temperature calibration from the InfraRed Flux Method in the Gaia system
• The Asteroseismic Target List (ATL) for solar-like oscillators observed in 2-minute cadence with the Transiting Exoplanet Survey Satellite (TESS)
• A 20-Second Cadence View of Solar-Type Stars and Their Planets with TESS: Asteroseismology of Solar Analogs and a Re-characterization of pi Men c
• A precise asteroseismic age and metallicity for HD 139614: a pre-main-sequence star with a protoplanetary disc in Upper-Centaurus Lupus
• SkyMapper stellar parameters for Galactic Archaeology on a grand-scale
• Fundamental stellar parameters of benchmark stars from CHARA interferometry. I. Metal-poor stars
• The TESS-Keck Survey I: A Warm Sub-Saturn-mass Planet and a Caution about Stray Light in TESS Cameras
• Precision angular diameters for 16 southern stars with VLTI/PIONIER
• The Evolution of Rotation and Magnetic Activity in 94 Aqr Aa from Asteroseismology with TESS
• Eclipsing binaries in the open cluster Ruprecht 147. I: EPIC 219394517
• Revised extinctions and radii for 1.5 million stars observed by APOGEE, GALAH, and RAVE
• Asteroseismology of the Hyades red giant and planet host epsilon Tauri
• TESS Reveals HD 118203 b to be a Transiting Planet
• The Gaia FGK benchmark stars version 2.1
• MCMCI: A code to fully characterise an exoplanetary system
• Towards reliable uncertainties in IR interferometry: The bootstrap for correlated statistical & systematic errors
• HD-TESS: An Asteroseismic Catalog of Bright Red Giants within TESS Continuous Viewing Zones
• Modelling the solar twin 18 Sco
• The Pulsation Properties of $\lambda$ Bootis Stars I. The Southern TESS Sample
• The K2 and TESS Synergy. I. Updated Ephemerides and Parameters for K2-114, K2-167, K2-237, and K2-261
• 3D Stagger model atmospheres with FreeEOS I. Exploring the impact of microphysics on the Sun
• Homogeneous Transit Timing Analyses of Ten Exoplanet Systems
• Angular Diameters and Fundamental Parameters of Forty-Four Stars from the Navy Precision Optical Interferometer
• Asteroseismic masses of four evolved planet-hosting stars using SONG and TESS: resolving the retired A-star mass controversy
• Fundamental stellar parameters of benchmark stars from CHARA interferometry -- II. Dwarf stars
• Luminaries in the Sky: The TESS Legacy Sample of Bright Stars. I. Asteroseismic detections in naked-eye main-sequence and sub-giant solar-like oscillators
• Revisiting the Red-giant Branch Hosts KOI-3886 and $\iota$ Draconis. Detailed Asteroseismic Modeling and Consolidated Stellar Parameters
• A binary with a $\delta$~Scuti star and an oscillating red giant: orbit and asteroseismology of KIC9773821
• Fundamental stellar parameters of benchmark stars from CHARA interferometry -- III. Giant and subgiant stars
• Measuring the Stellar and Planetary Properties of the 51 Eridani System
• Hubble Space Telescope Astrometry of the Metal-Poor Visual Binary $\mu$ Cassiopeiae: Dynamical Masses, Helium Content, and Age
• Radial velocity analysis of stars with debris discs
• Constraints on HD113337 fundamental parameters and planetary system. Combining long-base visible interferometry, disk imaging and high-contrast imaging
• Mass evaluation for red giant stars based on the spectroscopically determined atmospheric parameters
• Precise Parameters from Bayesian SED Fitting Indicate Thermally-Driven Mass Loss Likely Driver of Radius Valley