The Photoeccentric Effect and Proto-Hot Jupiters II. KOI-1474.01, a candidate eccentric planet perturbed by an unseen companion

Abstract

The exoplanets known as hot Jupiters---Jupiter-sized planets with periods less than 10 days---likely are relics of dynamical processes that shape all planetary system architectures. Socrates et al. (2012) argued that high eccentricity migration (HEM) mechanisms proposed for situating these close-in planets should produce an observable population of highly eccentric proto-hot Jupiters that have not yet tidally circularized. HEM should also create failed-hot Jupiters, with periapses just beyond the influence of fast circularization. Using the technique we previously presented for measuring eccentricities from photometry (the "photoeccentric effect"), we are distilling a collection of eccentric proto- and failed-hot Jupiters from the Kepler Objects of Interest (KOI). Here we present the first, KOI-1474.01, which has a long orbital period (69.7340 days) and a large eccentricity e = 0.81+0.10/-0.07, skirting the proto-hot Jupiter boundary. Combining Kepler photometry, ground-based spectroscopy, and stellar evolution models, we characterize host KOI-1474 as a rapidly-rotating F-star. Statistical arguments reveal that the transiting candidate has a low false-positive probability of 3.1%. KOI-1474.01 also exhibits transit timing variations of order an hour. We explore characteristics of the third-body perturber, which is possibly the "smoking-gun" cause of KOI-1474.01's large eccentricity. Using the host-star's rotation period, radius, and projected rotational velocity, we find KOI-1474.01's orbit is marginally consistent with aligned with the stellar spin axis, although a reanalysis is warranted with future additional data. Finally, we discuss how the number and existence of proto-hot Jupiters will not only demonstrate that hot Jupiters migrate via HEM, but also shed light on the typical timescale for the mechanism.

arXiv commentApJ, in press. Received 2012 July 7; accepted 2012 October 13

References in corpus (91)

• Analytic Lightcurves for Planetary Transit Searches
• Shrinking binary and planetary orbits by Kozai cycles with tidal friction
• Planet Occurrence within 0.25 AU of Solar-type Stars from Kepler
• Planetary Candidates Observed by Kepler, III: Analysis of the First 16 Months of Data
• Characteristics of planetary candidates observed by Kepler, II: Analysis of the first four months of data
• Kepler Input Catalog: Photometric Calibration and Stellar Classification
• DHP Framework: Digital Health Passports Using Blockchain -- Use case on international tourism during the COVID-19 pandemic
• On detecting terrestrial planets with timing of giant planet transits
• Hot Stars with Hot Jupiters Have High Obliquities
• Models of Giant Planet formation with migration and disc evolution
• Planet Migration and Binary Companions: the case of HD 80606b
• The Occurrence and Mass Distribution of Close-in Super-Earths, Neptunes, and Jupiters
• Star counts in the Galaxy. Simulating from very deep to very shallow photometric surveys with the TRILEGAL code
• Dynamical Origin of Extrasolar Planet Eccentricity Distribution
• Hot Jupiters from Secular Planet--Planet Interactions
• Unbound or Distant Planetary Mass Population Detected by Gravitational Microlensing
• Planet formation around stars of various masses: The snow line and the frequency of giant planets
• Origin of the Structure of the Kuiper Belt during a Dynamical Instability in the Orbits of Uranus and Neptune
• Origins of Eccentric Extrasolar Planets: Testing the Planet-Planet Scattering Model
• Spin-orbit angle measurements for six southern transiting planets; New insights into the dynamical origins of hot Jupiters
• Secular Chaos and the Production of Hot Jupiters
• Toward a Deterministic Model of Planetary Formation V. Accumulation Near the Ice Line
• The Exoplanet Orbit Database
• Ten New and Updated Multi-planet Systems, and a Survey of Exoplanetary Systems
• The Equilibrium-Tide Model for Tidal Friction
• Eccentricity Evolution for Planets in Gaseous Disks
• Structure and Evolution of Nearby Stars with Planets II. Physical Properties of ~1000 Cool Stars from the SPOCS Catalog
• The Frequency of Hot Jupiters Orbiting Nearby Solar-Type Stars
• The HARPS search for southern extra-solar planets XXXIV. Occurrence, mass distribution and orbital properties of super-Earths and Neptune-mass planets
• Parameter Estimation from Time-Series Data with Correlated Errors: A Wavelet-Based Method and its Application to Transit Light Curves
• A planet on an inclined orbit as an explanation of the warp in the Beta Pictoris disk
• Selection, Prioritization, and Characteristics of Kepler Target Stars
• Migration then assembly: Formation of Neptune mass planets inside 1 AU
• On the Formation of Hot Jupiters in Stellar Binaries
• Orbital perturbations on transiting planets: A possible method to measure stellar quadrupoles and to detect Earth-mass planets
• Exoplanetary Spin-Orbit Alignment: Results from the Ensemble of Rossiter-McLaughlin Observations
• Evidence of Possible Spin-Orbit Misalignment Along the Line of Sight in Transiting Exoplanet Systems
• Stellar Limb-Darkening Coefficients for CoRot and Kepler
• Kepler constraints on planets near hot Jupiters
• Modeling Kepler transit light curves as false positives: Rejection of blend scenarios for Kepler-9, and validation of Kepler-9d, a super-Earth-size planet in a multiple system
• Transit Timing Observations from Kepler: IV. Confirmation of 4 Multiple Planet Systems by Simple Physical Models
• Variations on Debris Disks: Icy Planet Formation at 30-150 AU for 1-3 Solar Mass Main Sequence Stars
• HAT-P-7: A Retrograde or Polar Orbit, and a Third Body
• Fomalhaut's Debris Disk and Planet: Constraining the Mass of Fomalhaut b From Disk Morphology
• The Mass of the Convective Zone in FGK Main Sequence Stars and the Effect of Accreted Planetary Material on Apparent Metallicity Determinations
• On the Reliability of Cross Correlation Function Lag Determinations in Active Galactic Nuclei
• The Exoplanet Census: A General Method, Applied to Kepler
• Expected Detection and False Alarm Rates for Transiting Jovian Planets
• Dynamical modeling of large scale asymmetries in the beta Pictoris dust disk
• The hot-Jupiter Kepler-17b: discovery, obliquity from stroboscopic starspots, and atmospheric characterization
• Consequences of the Ejection and Disruption of Giant Planets
• HD 80606 b, a planet on an extremely elongated orbit
• Statistical properties of exoplanets. I. The period distribution: constraints for the migration scenario
• Characterizing the Cool KOIs II. The M Dwarf KOI-254 and its Hot Jupiter
• Starspots and spin-orbit alignment in the WASP-4 exoplanetary system
• Calibration of Equilibrium Tide Theory for Extrasolar Planet Systems
• Predictions for a planet just inside Fomalhaut's eccentric ring
• The Detection and Characterization of a Nontransiting Planet by Transit Timing Variations
• On the Relation Between Hot Jupiters & the Roche Limit
• The Photoeccentric Effect and Proto-Hot Jupiters I. Measuring photometric eccentricities of individual transiting planets
• The Kepler-19 System: A Transiting 2.2 R_Earth Planet and a Second Planet Detected via Transit Timing Variations
• Effects of Orbital Eccentricity on Extrasolar Planet Transit Detection and Lightcurves
• Photometric and spectroscopic detection of the primary transit of the 111-day-period planet HD 80606 b
• HAT-P-13b,c: a transiting hot Jupiter with a massive outer companion on an eccentric orbit
• Formation, Survival, and Detectability of Planets Beyond 100 AU
• Transit Analysis Package (TAP and autoKep): IDL Graphical User Interfaces for Extrasolar Planet Transit Photometry
• Using Star Spots to Measure the Spin-orbit Alignment of Transiting Planets
• The Exoplanet Eccentricity Distribution from Kepler Planet Candidates
• Super-Eccentric Migrating Jupiters
• Discerning Exoplanet Migration Models Using Spin-Orbit Measurements
• Measurements of Stellar Inclinations for Kepler Planet Candidates
• Impact of Orbital Eccentricity on the Detection of Transiting Extrasolar Planets
• Neptune's wild days: constraints from the eccentricity distribution of the classical Kuiper Belt
• The Transit Ingress and the Tilted Orbit of the Extraordinarily Eccentric Exoplanet HD 80606b
• On the misalignment of the directly imaged planet β Pictoris b with the system's warped inner disk
• Transit Timing Observations from Kepler: VI. Transit Timing Variation Candidates in the First Seventeen Months from Polynomial Models
• Differential rotation in rapidly rotating F-stars
• HAT-P-17b,c: A Transiting, Eccentric, Hot Saturn and a Long-period, Cold Jupiter
• HAT-P-30b: A transiting hot Jupiter on a highly oblique orbit
• Transit timing variations in eccentric hierarchical triple exoplanetary systems. I. Perturbations on the time-scale of the orbital period of the perturber
• Migration of planets embedded in a circumstellar disk
• Transit Timing Observations from Kepler: VI. Potentially interesting candidate systems from Fourier-based statistical tests
• Two Upper Limits on the Rossiter-McLaughlin Effect, with Differing Implications: WASP-1 has a High Obliquity and WASP-2 is Indeterminate
• Qatar-2: A K dwarf orbited by a transiting hot Jupiter and a more massive companion in an outer orbit
• Planet - Disk Symbiosis
• The Time Dependence of hot Jupiters' Orbital Inclinations
• Exploring a Stream of Highly-Eccentric Binaries with Kepler
• An exoplanet in orbit around tau^1 Gruis
• The N2K Consortium VI: Doppler Shifts Without Templates and Three New Short-Period Planets
• A High Eccentricity Component in the Double Planet System Around HD 163607 and a Planet Around HD 164509
• The Frequency of Low-Mass Exoplanets. II. The `Period Valley'

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• Rapidly rotating stars and their transiting planets: KELT-17b, KELT-19Ab, and KELT-21b in the CHEOPS and TESS era
• Masses of the Kepler-419 Planets from Transit Timing Variations Analysis
• Periodic transit timing variations and refined system parameters of the exoplanet XO-6b
• An alternative stable solution for the Kepler-419 system, obtained with the use of a genetic algorithm
• Exciting mutual inclination in planetary systems with a distant stellar companion: the case of Kepler-108
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• 5 Years of Defocused Observations of Exoplanet Transits with T100: Timing Perspective
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