Giant Outer Transiting Exoplanet Mass (GOT 'EM) Survey. I. Confirmation of an Eccentric, Cool Jupiter With an Interior Earth-sized Planet Orbiting Kepler-1514

Abstract

Despite the severe bias of the transit method of exoplanet discovery toward short orbital periods, a modest sample of transiting exoplanets with orbital periods greater than 100 days is known. Long-term radial velocity (RV) surveys are pivotal to confirming these signals and generating a set of planetary masses and densities for planets receiving moderate to low irradiation from their host stars. Here, we conduct RV observations of Kepler-1514 from the Keck I telescope using the High Resolution Echelle Spectrometer. From these data, we measure the mass of the statistically validated giant ($1.108\pm 0.023$ $R_{\mathrm{J}}$) exoplanet Kepler-1514 b with a 218 day orbital period as $5.28\pm 0.22$ $M_{\mathrm{J}}$. The bulk density of this cool ($\sim$390 K) giant planet is $4.82_{-0.25}^{+0.26}$ g cm${}^{-3}$, consistent with a core supported by electron degeneracy pressure. We also infer an orbital eccentricity of $0.401_{-0.014}^{+0.013}$ from the RV and transit observations, which is consistent with planet-planet scattering and disk cavity migration models. The Kepler-1514 system contains an Earth-size, Kepler Object of Interest on a 10.5 day orbit that we statistically validate against false positive scenarios, including those involving a neighboring star. The combination of the brightness ($V$=11.8) of the host star and the long period, low irradiation, and high density of Kepler-1514 b places this system among a rare group of known exoplanetary systems and one that is amenable to continued study.

arXiv comment18 pages, 9 figures, accepted for publication in the Astronomical Journal

References in corpus (112)

• Maps of Dust IR Emission for Use in Estimation of Reddening and CMBR Foregrounds
• Astropy: A Community Python Package for Astronomy
• Gaia Data Release 2. Summary of the contents and survey properties
• Modules for Experiments in Stellar Astrophysics (MESA)
• The Transiting Exoplanet Survey Satellite
• Binary companions of evolved stars in APOGEE DR14: Search method and catalog of ~5,000 companions
• Modules for Experiments in Stellar Astrophysics (MESA): Giant Planets, Oscillations, Rotation, and Massive Stars
• Modules for Experiments in Stellar Astrophysics (MESA): Binaries, Pulsations, and Explosions
• MESA Isochrones and Stellar Tracks (MIST). I: Solar-Scaled Models
• Analytic Lightcurves for Planetary Transit Searches
• MESA Isochrones and Stellar Tracks (MIST) 0: Methods for the construction of stellar isochrones
• The K2 Mission: Characterization and Early results
• Shrinking binary and planetary orbits by Kozai cycles with tidal friction
• Kepler Presearch Data Conditioning II - A Bayesian Approach to Systematic Error Correction
• Planetary Radii across Five Orders of Magnitude in Mass and Stellar Insolation: Application to Transits
• A continuum from clear to cloudy hot-Jupiter exoplanets without primordial water depletion
• Dynamical Outcomes of Planet-Planet Scattering
• Efficient, uninformative sampling of limb darkening coefficients for two-parameter laws
• On the Unique Solution of Planet and Star Parameters from an Extrasolar Planet Transit Light Curve
• Kepler Presearch Data Conditioning I - Architecture and Algorithms for Error Correction in Kepler Light Curves
• Theoretical Transmission Spectra During Extrasolar Giant Planet Transits
• EXOFAST: A fast exoplanetary fitting suite in IDL
• Overview of the Kepler Science Processing Pipeline
• Star counts in the Galaxy. Simulating from very deep to very shallow photometric surveys with the TRILEGAL code
• Probabilistic Forecasting of the Masses and Radii of Other Worlds
• Origins of Hot Jupiters
• Chromospheric Activity and Jitter Measurements for 2630 Stars on the California Planet Search
• Improving the Efficiency of Markov Chain Monte Carlo for Analyzing the Orbits of Extrasolar Planets
• False positive probabilties for all Kepler Objects of Interest: 1284 newly validated planets and 428 likely false positives
• The Mass-Metallicity Relation for Giant Planets
• Planetary Candidates Observed by Kepler. VIII. A Fully Automated Catalog With Measured Completeness and Reliability Based on Data Release 25
• The California Planet Survey I. Four New Giant Exoplanets
• The GAPS Programme with HARPS-N@TNG XIV. Investigating giant planet migration history via improved eccentricity and mass determination for 231 transiting planets
• A temperate rocky super-Earth transiting a nearby cool star
• Exoplanetary Atmospheres: Key Insights, Challenges and Prospects
• STARRY: Analytic Occultation Light Curves
• Evidence for a systematic offset of -80 micro-arcseconds in the Gaia DR2 parallaxes
• Almost All of Kepler's Multiple Planet Candidates are Planets
• Precision Stellar Characterization of FGKM Stars using an Empirical Spectral Library
• The Mass of KOI-94d and a Relation for Planet Radius, Mass, and Incident Flux
• Limits on Planetary Companions from Doppler Surveys of Nearby Stars
• Transit timing effects due to an exomoon
• SOPHIE velocimetry of Kepler transit candidates XVII. The physical properties of giant exoplanets within 400 days of period
• The Impact of Stellar Multiplicity on Planetary Systems, I.: The Ruinous Influence of Close Binary Companions
• The Heavy Element Masses of Extrasolar Giant Planets, Revealed
• An Efficient Automated Validation Procedure for Exoplanet Transit Candidates
• The Kepler Follow-Up Observation Program. I. A Catalog of Companions to Kepler Stars from High-Resolution Imaging
• Transiting exoplanets from the CoRoT space mission II. CoRoT-Exo-2b: A transiting planet around an active G star
• Lack of Inflated Radii for Kepler Giant Planet Candidates Receiving Modest Stellar Irradiation
• Improving Galactic Center Astrometry by Reducing the Effects of Geometric Distortion
• Stability of Satellites Around Close-in Extrasolar Giant Planets
• Mass-Metallicity Trends in Transiting Exoplanets from Atmospheric Abundances of H${}_2$O, Na, and K
• Planetary Candidates from the First Year of the K2 Mission
• HAT-P-26b: A Neptune-Mass Exoplanet with a Well Constrained Heavy Element Abundance
• Transit Timing Observations from Kepler. IX. Catalog of the Full Long-Cadence Data Set
• HD 80606 b, a planet on an extremely elongated orbit
• An Excess of Jupiter Analogs in Super-Earth Systems
• The Super Earth-Cold Jupiter Relations
• Transit timing effects due to an exomoon II
• The Hunt for Exomoons with Kepler (HEK): I. Description of a New Observational Project
• Analytic Planetary Transit Light Curves and Derivatives for Stars with Polynomial Limb Darkening
• Effect of stellar spots on high-precision transit light-curve
• Photometric and spectroscopic detection of the primary transit of the 111-day-period planet HD 80606 b
• TESS Spots a Compact System of Super-Earths around the Naked-Eye Star HR 858
• Possibility of a photometric detection of "exomoons"
• HEK VI: On the Dearth of Galilean Analogs in Kepler and the Exomoon Candidate Kepler-1625b I
• Determination of the size, mass, and density of "exomoons" from photometric transit timing variations
• The Rossiter-McLaughlin effect in Exoplanet Research
• The population of long-period transiting exoplanets
• Demystifying Kepler Data: A Primer for Systematic Artifact Mitigation
• The Hunt for Exomoons with Kepler (HEK): V. A Survey of 41 Planetary Candidates for Exomoons
• Four Sub-Saturns with Dissimilar Densities: Windows into Planetary Cores and Envelopes
• Detection of Stars within $\sim$0.8 arcseconds of Kepler Objects of Interest
• Orbital Architectures of Planet-Hosting Binaries: I. Forming Five Small Planets in the Truncated Disk of Kepler-444A
• Investigating hot-Jupiter inflated radii with hierarchical Bayesian modelling
• Planet Hunters. VIII. Characterization of 41 Long-Period Exoplanet Candidates from Kepler Archival Data
• Five Planets Transiting a Ninth Magnitude Star
• HATS-17b: A Transiting Compact Warm Jupiter in a 16.3 Days Circular Orbit
• KELT-8b: A highly inflated transiting hot Jupiter and a new technique for extracting high-precision radial velocities from noisy spectra
• Predicting the Yields of Photometric Surveys for Transiting Extrasolar Planets
• Spin-Orbit Alignment for the Circumbinary Planet Host Kepler-16A
• Single Transit Candidates from K2: Detection and Period Estimation
• Planet Hunters TESS I: TOI 813, a subgiant hosting a transiting Saturn-sized planet on an 84-day orbit
• Resonant Removal of Exomoons During Planetary Migration
• Transiting Planet Candidates Beyond the Snow Line Detected by Visual Inspection of 7557 Kepler Objects of Interest
• An Estimate of the Yield of Single-Transit Planetary Events from the Transiting Exoplanet Survey Satellite
• Exploring Kepler Giant Planets in the Habitable Zone
• TOI-222: a single-transit TESS candidate revealed to be a 34-day eclipsing binary with CORALIE, EulerCam and NGTS
• NGTS-11 b / TOI-1847 b: A transiting warm Saturn recovered from a TESS single-transit event
• Kepler-1661 b: A Neptune-sized Kepler Transiting Circumbinary Planet around a Grazing Eclipsing Binary
• ESO Imaging Survey. The Stellar Catalogue in the Chandra Deep Field South
• The TESS-Keck Survey I: A Warm Sub-Saturn-mass Planet and a Caution about Stray Light in TESS Cameras
• Mutual Orbital Inclinations Between Cold Jupiters and Inner Super-Earths
• Revisiting the Long-Period Transiting Planets from Kepler
• Revisiting migration in a disc cavity to explain the high eccentricities of warm Jupiters
• The Transit Transmission Spectrum of a Cold Gas Giant Planet
• Single site observations of \textit{TESS} single transit detections
• Transiting Planets near the Snow Line from Kepler. I. Catalog
• Spitzer Detection of the Transiting Jupiter-analog Exoplanet Kepler-167e
• No Timing Variations Observed in Third Transit of Snow-Line Exoplanet Kepler-421b
• The Magellan/PFS Exoplanet Search: A 55-day period dense Neptune transiting the bright ($V=8.6$) star HD 95338
• The Transit Spectra of Earth and Jupiter
• Predicted Yield of Transits of Known Radial Velocity Exoplanets from the TESS Primary and Extended Missions
• Transiting planet candidate from K2 with the longest period
• Exomoon indicators in high-precision transit light curves
• Using HARPS-N to characterise the long-period planets in the PH-2 and Kepler-103 systems
• Resolving period aliases for TESS monotransits recovered during the extended mission
• Kepler Transit Depths Contaminated by a Phantom Star
• Multiple Explanations for the Single Transit of KIC 5951458 based on Radial Velocity Measurements Extracted with a Novel Matched-template Technique
• Out-of-Transit Refracted Light in the Atmospheres of Transiting and Non-Transiting Exoplanets
• Impossible moons -- Transit timing effects that cannot be due to an exomoon
• Refraction in exoplanet atmospheres: Photometric signatures, implications for transmission spectroscopy, and search in Kepler data

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• The TESS-Keck Survey. VIII. Confirmation of a Transiting Giant Planet on an Eccentric 261 day Orbit with the Automated Planet Finder Telescope
• Kepler-167e as a Probe of the Formation Histories of Cold Giants with Inner Super-Earths
• A Mini-Neptune from TESS and CHEOPS Around the 120 Myr Old AB Dor member HIP 94235
• TOI-5678 b: A 48-day transiting Neptune-mass planet characterized with CHEOPS and HARPS
• Three long period transiting giant planets from TESS
• Giant Outer Transiting Exoplanet Mass (GOT 'EM) Survey. II. Discovery of a Failed Hot Jupiter on a 2.7 Year, Highly Eccentric Orbit
• The GAPS programme at TNG XLIV. Projected rotational velocities of 273 exoplanet-host stars observed with HARPS-N
• The SOPHIE search for northern extrasolar planets. XVIII: Six new cold Jupiters, including one of the most eccentric exoplanet orbits
• Observations of scattered light from exoplanet atmospheres
• On the follow-up efforts of long-period transiting planet candidates detected with Gaia astrometry
• The California Legacy Survey III. On The Shoulders of (Some) Giants: The Relationship between Inner Small Planets and Outer Massive Planets