Revised Properties and Dynamical History for the HD 17156 System

Abstract

From the thousands of known exoplanets, those that transit bright host stars provide the greatest accessibility toward detailed system characterization. The first known such planets were generally discovered using the radial velocity technique, then later found to transit. HD 17156b is particularly notable among these initial discoveries because it diverged from the typical hot Jupiter population, occupying a 21.2 day eccentric ($e=0.68$) orbit, offering preliminary insights into the evolution of planets in extreme orbits. Here we present new data for this system, including ground and space-based photometry, radial velocities, and speckle imaging, that further constrain the system properties and stellar/planetary multiplicity. These data include photometry from the Transiting Exoplanet Survey Satellite (TESS) that cover five transits of the known planet. We show that the system does not harbor any additional giant planets interior to 10 AU. The lack of stellar companions and the age of the system indicate that the eccentricity of the known planet may have resulted from a previous planet-planet scattering event. We provide the results from dynamical simulations that suggest possible properties of an additional planet that culminated in ejection from the system, leaving a legacy of the observed high eccentricity for HD 17156b.

arXiv comment15 pages, 7 figures, accepted for publication in the Astronomical Journal

References in corpus (77)

• The Transiting Exoplanet Survey Satellite
• Detection of Planetary Transits Across a Sun-like Star
• Gaia Early Data Release 3: Parallax bias versus magnitude, colour, and position
• Dynamical Outcomes of Planet-Planet Scattering
• The Occurrence and Architecture of Exoplanetary Systems
• EXOFAST: A fast exoplanetary fitting suite in IDL
• A Technique for Extracting Highly Precise Photometry for the Two-Wheeled Kepler Mission
• Dynamical Origin of Extrasolar Planet Eccentricity Distribution
• Homogeneous studies of transiting extrasolar planets. IV. Thirty systems with space-based light curves
• RadVel: The Radial Velocity Modeling Toolkit
• Improving the Efficiency of Markov Chain Monte Carlo for Analyzing the Orbits of Extrasolar Planets
• Origins of Eccentric Extrasolar Planets: Testing the Planet-Planet Scattering Model
• Understanding The Effects Of Stellar Multiplicity On The Derived Planet Radii From Transit Surveys: Implications for Kepler, K2, and TESS
• Eccentricity from transit photometry: small planets in Kepler multi-planet systems have low eccentricities
• Limits on Planetary Companions from Doppler Surveys of Nearby Stars
• Asteroseismology and Gaia: Testing Scaling Relations Using 2200 Kepler Stars with TGAS Parallaxes
• A Guide to Realistic Uncertainties on Fundamental Properties of Solar-Type Exoplanet Host Stars
• HD 80606 b, a planet on an extremely elongated orbit
• Orbital Phase Variations of the Eccentric Giant Planet HAT-P-2b
• On the Eccentricity Distribution of Exoplanets from Radial Velocity Surveys
• The Photoeccentric Effect and Proto-Hot Jupiters I. Measuring photometric eccentricities of individual transiting planets
• Effects of Orbital Eccentricity on Extrasolar Planet Transit Detection and Lightcurves
• AMD-stability and the classification of planetary systems
• Five Intermediate-Period Planets from the N2K Sample
• The NASA-UC Eta-Earth Program: I. A Super-Earth Orbiting HD 7924
• The Exoplanet Eccentricity Distribution from Kepler Planet Candidates
• High eccentricity planets from the Anglo-Australian Planet Search
• TESS Transit Timing of Hundreds of Hot Jupiters
• Stellar Companions of Exoplanet Host Stars in K2
• Three-dimensional atmospheric circulation of hot Jupiters on highly eccentric orbits
• Impact of Orbital Eccentricity on the Detection of Transiting Extrasolar Planets
• Architectures of Exoplanetary Systems. III: Eccentricity and Mutual Inclination Distributions of AMD-stable Planetary Systems
• HD 17156b: A Transiting Planet with a 21.2 Day Period and an Eccentric Orbit
• Constraining Orbital Parameters Through Planetary Transit Monitoring
• Two Transiting Earth-size Planets Near Resonance Orbiting a Nearby Cool Star
• Refining Exoplanet Ephemerides and Transit Observing Strategies
• A Possible Spin-Orbit Misalignment in the Transiting Eccentric Planet HD 17156b
• The effects of external planets on inner systems: multiplicities, inclinations, and pathways to eccentric warm Jupiters
• Adaptive Optics Images II: 12 Kepler Objects of Interest and 15 Confirmed Transiting Planets
• On the origin of eccentricities among extrasolar planets
• Planet-planet scattering as the source of the highest eccentricity exoplanets
• Asteroseismology of the Transiting Exoplanet Host HD 17156 with HST FGS
• Coordinated X-ray and Optical observations of Star-Planet Interaction in HD 17156
• Architectures of Planetary Systems and Implications for their Formation
• Detailed Abundances of Planet-Hosting Wide Binaries. I. Did Planet Formation Imprint Chemical Signatures in the Atmospheres of HD 20782/81?
• The Spin-Orbit Alignment of the HD17156 Transiting Eccentric Planetary System
• Precise Estimates of the Physical Parameters for the Exoplanet System HD-17156 Enabled by HST FGS Transit and Asteroseismic Observations
• The Habitable Zone and Extreme Planetary Orbits
• The Transit Light Curve Project. X. A Christmas Transit of HD 17156b
• The HD 192263 system: planetary orbital period and stellar variability disentangled
• Exploring Kepler Giant Planets in the Habitable Zone
• Orbital Dynamics of Multi-Planet Systems with Eccentricity Diversity
• Parameters and Predictions for the Long-Period Transiting Planet HD 17156b
• Improved Measurement of the Rossiter-McLaughlin Effect in the Exoplanetary System HD 17156
• Characterization of the HD 17156 planetary system
• EXPRES I. HD~3651 an Ideal RV Benchmark
• Detailed chemical compositions of the wide binary HD 80606/80607: revised stellar properties and constraints on planet formation
• The Fundamental Connections Between the Solar System and Exoplanetary Science
• Transits of Known Planets Orbiting a Naked-Eye Star
• Direct Measure of Radiative and Dynamical Properties of an Exoplanet Atmosphere
• Evidence for Reflected Light from the Most Eccentric Exoplanet Known
• Improved parameters for the transiting planet HD 17156b: a high-density giant planet with a very eccentric orbit
• Science Extraction from TESS Observations of Known Exoplanet Hosts
• Completeness of Imaging Surveys for Eccentric Exoplanets
• Detectability of Exoplanetary Transits from Radial Velocity Surveys
• Detectability of Exoplanet Periastron Passage in the Infra-Red
• TESS Reveals HD 118203 b to be a Transiting Planet
• Giant planets: good neighbors for habitable worlds?
• Maximum Angular Separation Epochs for Exoplanet Imaging Observations
• Role of gaseous giants in the dynamical evolution of terrestrial planets and water delivery in the habitable zone
• In the Presence of a Wrecking Ball: Orbital Stability in the HR 5183 System
• Born extra-eccentric: A broad spectrum of primordial configurations of the gas giants that match their present-day orbits
• Predicted Yield of Transits of Known Radial Velocity Exoplanets from the TESS Primary and Extended Missions
• Variable Irradiation on 1D Cloudless Eccentric Exoplanet Atmospheres
• Long-Term Stability of Planets in the $\alpha$ Centauri System, II: Forced Eccentricities
• Exoplanetary Transit Constraints Based Upon Secondary Eclipse Observations
• Giant Outer Transiting Exoplanet Mass (GOT 'EM) Survey. II. Discovery of a Failed Hot Jupiter on a 2.7 Year, Highly Eccentric Orbit

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• Variability of Known Exoplanet Host Stars Observed by TESS
• Giant Outer Transiting Exoplanet Mass (GOT 'EM) Survey. VI: Confirmation of a Long-Period Giant Planet Discovered with a Single TESS Transit
• The TESS-Keck Survey. XIX. A Warm Transiting Sub-Saturn Mass Planet and a non-Transiting Saturn Mass Planet Orbiting a Solar Analog