Stellar Diameters and Temperatures VI. High angular resolution measurements of the transiting exoplanet host stars HD 189733 and HD 209458 and implications for models of cool dwarfs

Abstract

We present direct radii measurements of the well-known transiting exoplanet host stars HD 189733 and HD 209458 using the CHARA Array interferometer. We find the limb-darkened angular diameters to be theta_LD = 0.3848 +/- 0.0055 and 0.2254 +/- 0.0072 milliarcsec for HD 189733 and HD 209458, respectively. HD 189733 and HD 209458 are currently the only two transiting exoplanet systems where detection of the respective planetary companion's orbital motion from high resolution spectroscopy has revealed absolute masses for both star and planet. We use our new measurements together with the orbital information from radial velocity and photometric time series data, Hipparcos distances, and newly measured bolometric fluxes to determine the stellar effective temperatures (T_eff = 4875 +/- 43, 6093 +/- 103 K), stellar linear radii (R_* = 0.805 +/- 0.016, 1.203 +/- 0.061 R_sun), mean stellar densities (rho_* = 1.62 +/- 0.11, 0.58 +/- 0.14 rho_sun), planetary radii (R_p = 1.216 +/- 0.024, 1.451 +/- 0.074 R_Jup), and mean planetary densities (rho_p = 0.605 +/- 0.029, 0.196 +/- 0.033 rho_Jup) for HD 189733 b and HD 209458 b, respectively. The stellar parameters for HD 209458, a F9 dwarf, are consistent with indirect estimates derived from spectroscopic and evolutionary modeling. However, we find that models are unable to reproduce the observational results for the K2 dwarf, HD 189733. We show that, for stellar evolutionary models to match the observed stellar properties of HD 189733, adjustments lowering the solar-calibrated mixing length parameter from 1.83 to 1.34 need to be employed.

References in corpus (29)

• The Dartmouth Stellar Evolution Database
• New constraints on the chemical evolution of the solar neighbourhood and Galactic disc(s). Improved astrophysical parameters for the Geneva-Copenhagen Survey
• Habitable Zones Around Main-Sequence Stars: Dependence on Planetary Mass
• Improved parameters for extrasolar transiting planets
• Helioseismology and Solar Abundances
• A new implementation of the infrared flux method using the 2MASS catalogue
• Evolution of low-mass star and brown dwarf eclipsing binaries
• Improving Stellar and Planetary Parameters of Transiting Planet Systems: The Case of TrES-2
• Trumpeting M Dwarfs with CONCH-SHELL: a Catalog of Nearby Cool Host-Stars for Habitable ExopLanets and Life
• KOI-126: A Triply-Eclipsing Hierarchical Triple with Two Low-Mass Stars
• Spectro-Thermometry of M dwarfs and their candidate planets: too hot, too cool, or just right?
• TASS Mark IV Photometric Survey of the Northern Sky
• Stellar Diameters and Temperatures IV. Predicting Stellar Angular Diameters
• Homogeneous studies of transiting extrasolar planets. II. Physical properties
• Stellar Diameters and Temperatures V. Eleven Newly Characterized Exoplanet Host Stars
• BANYAN. IV. Fundamental parameters of low-mass star candidates in nearby young stellar kinematic groups - Isochronal Age determination using Magnetic evolutionary models
• The transiting exoplanet host star GJ 436: a test of stellar evolution models in the lower main sequence, and revised planetary parameters
• CHARA Array Measurements of the Angular Diameters of Exoplanet Host Stars
• Spectropolarimetric observations of the transiting planetary system of the K dwarf HD 189733
• Self-Consistent Magnetic Stellar Evolution Models of the Detached, Solar-Type Eclipsing Binary EF Aquarii
• The corona of HD 189733 and its X-ray activity
• A stellar companion in the HD 189733 system with a known transiting extrasolar planet
• A near-infrared interferometric survey of debris disc stars. II. CHARA/FLUOR observations of six early-type dwarfs
• Identifying new opportunities for exoplanet characterisation at high spectral resolution
• Characterizing the Cool KOIs. VI. H- and K-band Spectra of Kepler M Dwarf Planet-Candidate Hosts
• Angular Diameters of the G Subdwarf $\mu$ Cassiopeiae A and the K Dwarfs $\sigma$ Draconis and HR 511 from Interferometric Measurements with the CHARA Array
• The ability of intermediate-band Stromgren photometry to correctly identify dwarf, subgiant, and giant stars and provide stellar metallicities and surface gravities
• Habitable Zone Dependence on Stellar Parameter Uncertainties
• Direct Measurement of the Radius and Density of the Transiting Exoplanet HD 189733B with the CHARA Array

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• HELIOS: An Open-source, GPU-accelerated Radiative Transfer Code For Self-consistent Exoplanetary Atmospheres
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• One of Everything: The Breakthrough Listen Exotica Catalog
• Retrieving the transmission spectrum of HD 209458b using CHOCOLATE: A new chromatic Doppler tomography technique
• A circularly polarized low-frequency radio burst from the exoplanetary system HD 189733
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• An Informational-Entropic Approach to Exoplanet Characterization
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• Linking atmospheric chemistry of the hot Jupiter HD 209458b to its formation location through infrared transmission and emission spectra
• An Hα Transit of HD 189733b to Assess Stellar Activity Across the Transit Chord Close to JWST Observations
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