SOPHIE velocimetry of Kepler transit candidates XII. KOI-1257 b: a highly eccentric three-month period transiting exoplanet

Abstract

In this paper we report a new transiting warm giant planet: KOI-1257 b. It was first detected in photometry as a planet-candidate by the $Kepler$ space telescope and then validated thanks to a radial velocity follow-up with the SOPHIE spectrograph. It orbits its host star with a period of 86.647661 d $\pm$ 3 s and a high eccentricity of 0.772 $\pm$ 0.045. The planet transits the main star of a metal-rich, relatively old binary system with stars of mass of 0.99 $\pm$ 0.05 Msun and 0.70 $\pm$ 0.07 Msun for the primary and secondary, respectively. This binary system is constrained thanks to a self-consistent modelling of the $Kepler$ transit light curve, the SOPHIE radial velocities, line bisector and full-width half maximum (FWHM) variations, and the spectral energy distribution. However, future observations are needed to confirm it. The PASTIS fully-Bayesian software was used to validate the nature of the planet and to determine which star of the binary system is the transit host. By accounting for the dilution from the binary both in photometry and in radial velocity, we find that the planet has a mass of 1.45 $\pm$ 0.35 Mjup, and a radius of 0.94 $\pm$ 0.12 Rjup, and thus a bulk density of 2.1 $\pm$ 1.2 g.cm${}^{-3}$. The planet has an equilibrium temperature of 511 $\pm$ 50 K, making it one of the few known members of the warm-jupiter population. The HARPS-N spectrograph was also used to observe a transit of KOI-1257 b, simultaneously with a joint amateur and professional photometric follow-up, with the aim of constraining the orbital obliquity of the planet. However, the Rossiter-McLaughlin effect was not clearly detected, resulting in poor constraints on the orbital obliquity of the planet.

arXiv comment39 pages, 17 figures, accepted for publication in Astronomy & Astrophysics

References in corpus (111)

• The Wide-field Infrared Survey Explorer (WISE): Mission Description and Initial On-orbit Performance
• PARSEC: stellar tracks and isochrones with the PAdova and TRieste Stellar Evolution Code
• Cosmological parameters from SDSS and WMAP
• A Survey of Stellar Families: Multiplicity of Solar-Type Stars
• The Dartmouth Stellar Evolution Database
• The false positive rate of Kepler and the occurrence of planets
• 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
• Achieving better than 1 minute accuracy in the Heliocentric and Barycentric Julian Dates
• Kepler Input Catalog: Photometric Calibration and Stellar Classification
• Obliquities of Hot Jupiter host stars: Evidence for tidal interactions and primordial misalignments
• Defining and cataloging exoplanets: The exoplanet.eu database
• Overview of the Kepler Science Processing Pipeline
• The Occurrence and Mass Distribution of Close-in Super-Earths, Neptunes, and Jupiters
• Transiting exoplanets from the CoRoT space mission VIII. CoRoT-7b: the first Super-Earth with measured radius
• Spectroscopic parameters for 451 stars in the HARPS GTO planet search program. Stellar [Fe/H] and the frequency of exo-Neptunes
• The CORALIE survey for southern extra-solar planets VII. Two short-period Saturnian companions to HD108147 and HD168746
• On the radiative equilibrium of irradiated planetary atmospheres
• Extrasolar planet population synthesis I: Method, formation tracks and mass-distance distribution
• Validation of Kepler's Multiple Planet Candidates. III: Light Curve Analysis & Announcement of Hundreds of New Multi-planet Systems
• Masses, Radii, and Orbits of Small Kepler Planets: The Transition from Gaseous to Rocky Planets
• Spin-orbit angle measurements for six southern transiting planets; New insights into the dynamical origins of hot Jupiters
• Evolution of "51Peg b-like" Planets
• A dynamically-packed planetary system around GJ667C with three super-Earths in its habitable zone
• Homogeneous studies of transiting extrasolar planets. I. Light curve analyses
• Eccentricity Evolution for Planets in Gaseous Disks
• Friends of Hot Jupiters I: A Radial Velocity Search for Massive, Long-Period Companions to Close-In Gas Giant Planets
• From binaries to multiples II: hierarchical multiplicity of F and G dwarfs
• Measurement of Spin-Orbit Alignment in an Extrasolar Planetary System
• Structure and evolution of super-Earth to super-Jupiter exoplanets: I. heavy element enrichment in the interior
• A correlation between the heavy element content of transiting extrasolar planets and the metallicity of their parent stars
• A new code for automatic determination of equivalent widths: Automatic Routine for line Equivalent widths in stellar Spectra (ARES)
• Binning is sinning: morphological light-curve distortions due to finite integration time
• SWEET-Cat: A catalogue of parameters for Stars With ExoplanETs I. New atmospheric parameters and masses for 48 stars with planets
• The Mass of KOI-94d and a Relation for Planet Radius, Mass, and Incident Flux
• WASP-1b and WASP-2b: Two new transiting exoplanets detected with SuperWASP and SOPHIE
• HAT-P-1b: A Large-Radius, Low-Density Exoplanet Transiting one Member of a Stellar Binary
• Lack of Inflated Radii for Kepler Giant Planet Candidates Receiving Modest Stellar Irradiation
• CHEOPS: A Transit Photometry Mission for ESA's Small Mission Programme
• Transit Timing Observations from Kepler: IV. Confirmation of 4 Multiple Planet Systems by Simple Physical Models
• On the Low False Positive Probabilities of Kepler Planet Candidates
• The CORALIE survey for southern extra-solar planets IX. A 1.3-day period brown dwarf disguised as a planet
• Validation of Kepler's Multiple Planet Candidates. II: Refined Statistical Framework and Descriptions of Systems of Special Interest
• Two new "very hot Jupiters" among the OGLE transiting candidates
• Accurate fundamental parameters for 23 bright solar-type stars
• Giant planets orbiting metal-rich stars show signatures of planet-planet interactions
• Characterizing the Cool KOIs III. KOI-961: A Small Star with Large Proper Motion and Three Small Planets
• An Earth-sized planet with an Earth-like density
• WASP-17b: an ultra-low density planet in a probable retrograde orbit
• From binaries to multiples I: Data on F and G dwarfs within 67 pc of the Sun
• Extrasolar planet population synthesis II: Statistical comparison with observation
• PASTIS: Bayesian extrasolar planet validation. I. General framework, models, and performance
• 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
• SOPHIE velocimetry of Kepler transit candidates VII. A false-positive rate of 35% for Kepler close-in giant exoplanet candidates
• Transit Timing Observations from Kepler. VIII Catalog of Transit Timing Measurements of the First Twelve Quarters
• Ab Initio Equation of State for Hydrogen-Helium Mixtures with Recalibration of the Giant-Planet Mass-Radius Relation
• HAT-P-32b and HAT-P-33b: Two Highly Inflated Hot Jupiters Transiting High-Jitter Stars
• Deriving precise parameters for cool solar-type stars. Optimizing the iron line list
• The "missing link": a 4-day period transiting exoplanet around OGLE-TR-111
• Transits and Occultations of an Earth-Sized Planet in an 8.5-Hour Orbit
• HAT-P-20b--HAT-P-23b: Four Massive Transiting Extrasolar Planets
• Improved stellar parameters of CoRoT-7
• Effect of stellar spots on high-precision transit light-curve
• The Photoeccentric Effect and Proto-Hot Jupiters I. Measuring photometric eccentricities of individual transiting planets
• SOPHIE+: First results of an octagonal-section fiber for high-precision radial velocity measurements
• Robotic Laser-Adaptive-Optics Imaging of 715 Kepler Exoplanet Candidates using Robo-AO
• Photometric and spectroscopic detection of the primary transit of the 111-day-period planet HD 80606 b
• Testing blend scenarios for extrasolar transiting planet candidates. I. -- OGLE-TR-33: a false positive
• Asymmetric transit curves as indication of orbital obliquity: clues from the late-type dwarf companion in KOI-13
• WASP-52b, WASP-58b, WASP-59b, and WASP-60b: four new transiting close-in giant planets
• Tidal evolution of hierarchical and inclined systems
• The SOPHIE search for northern extrasolar planets III. A Jupiter-mass companion around HD 109246
• Transit timing variations in WASP-10b induced by stellar activity?
• The HARPS search for southern extra-solar planets XXXV. The interesting case of HD41248: stellar activity, no planets?
• The Effect of Composition on the Evolution of Giant and Intermediate-Mass Planets
• Observation of the full 12-hour-long transit of the exoplanet HD80606b. Warm-Spitzer photometry and SOPHIE spectroscopy
• Transit Timing Observations from Kepler: I. Statistical Analysis of the First Four Months
• Characterizing the Orbital Eccentricities of Transiting Extrasolar Planets with Photometric Observations
• Ground-based photometry of space-based transit detections: Photometric follow-up of the CoRoT mission
• What asteroseismology can do for exoplanets: Kepler-410A b is a Small Neptune around a bright star, in an eccentric orbit consistent with low obliquity
• Orbital and physical properties of planets and their hosts: new insights on planet formation and evolution
• Kepler-14b: A massive hot Jupiter transiting an F star in a close visual binary
• The HARPS search for southern extra-solar planets XXXV. Super-Earths around the M-dwarf neighbors Gl433 and Gl667C
• Bayesian analysis of radial velocity data of GJ667C with correlated noise: evidence for only 2 planets
• CoRoT-10b: a giant planet in a 13.24 day eccentric orbit
• New analytical expressions of the Rossiter-McLaughlin effect adapted to different observation techniques
• Thermal Processes Governing Hot-Jupiter Radii
• Refined stellar, orbital and planetary parameters of the eccentric HAT-P-2 planetary system
• An analysis of the CoRoT-2 system: A young spotted star and its inflated giant planet
• Spin-orbit inclinations of the exoplanetary systems HAT-P-8, HAT-P-9, HAT-P-16 and HAT-P-23
• An Independent Planet Search In The Kepler Dataset. II. An extremely low-density super-Earth mass planet around Kepler-87
• The contribution of secondary eclipses as astrophysical false positives to exoplanet transit surveys
• The SOPHIE search for northern extrasolar planets. IV. Massive companions in the planet-brown dwarf boundary
• Two Super-Earths Orbiting the Solar Analogue HD41248 on the edge of a 7:5 Mean Motion Resonance
• The Photoeccentric Effect and Proto-Hot Jupiters II. KOI-1474.01, a candidate eccentric planet perturbed by an unseen companion
• SOPHIE velocimetry of Kepler transit candidates XI. Kepler-412 system: probing the properties of a new inflated hot Jupiter
• Higher-precision radial velocity measurements with the SOPHIE spectrograph using octagonal-section fibers
• SOPHIE velocimetry of Kepler transit candidates IV. KOI-196b: a non-inflated hot-Jupiter with a high albedo
• KOI-200b and KOI-889b: two transiting exoplanets detected and characterized with Kepler, SOPHIE and HARPS-N
• SOPHIE velocimetry of Kepler transit candidates VI. An additional companion in the KOI-13 system
• MARVELS-1: A face-on double-lined binary star masquerading as a resonant planetary system; and consideration of rare false positives in radial velocity planet searches
• A Window on Exoplanet Dynamical Histories: Rossiter-McLaughlin Observations of WASP-13b and WASP-32b
• Shedding Light on the Eccentricity Valley: Gap Heating and Eccentricity Excitation of Giant Planets in Protoplanetary Disks
• SOPHIE velocimetry of Kepler transit candidates II. KOI-428b: a hot Jupiter transiting a subgiant F-star
• Dynamical analysis and constraints for the HD 196885 system
• Probabilities of exoplanet signals from posterior samplings
• Tidal damping of the mutual inclination in hierachical systems
• SOPHIE velocimetry of Kepler transit candidates: X KOI-142c: first radial velocity confirmation of a non-transiting exoplanet discovered by transit timing
• CoRoT LRa02_E2_0121: Neptune-size planet candidate turns into a hierarchical triple system with a giant primary

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• Probabilistic Forecasting of the Masses and Radii of Other Worlds
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• The Mass-Metallicity Relation for Giant Planets
• Revised Stellar Properties of Kepler Targets for the Q1-17 (DR25) Transit Detection Run
• SOPHIE velocimetry of Kepler transit candidates XVII. The physical properties of giant exoplanets within 400 days of period
• WASP-121 b: a hot Jupiter in a polar orbit and close to tidal disruption
• Stellar obliquities in exoplanetary systems
• Evidence of an Upper Bound on the Masses of Planets and its Implications for Giant Planet Formation
• Impact of Binary Stars on Planet Statistics -- I. Planet Occurrence Rates, Trends with Stellar Mass, and Wide Companions to Hot Jupiter Hosts
• An Earth-sized exoplanet with a Mercury-like composition
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• On the detection of Exomoons: A search in Kepler data for the orbital sampling effect and the scatter peak
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• BEBOP III. Observations and an independent mass measurement of Kepler-16 (AB) b -- the first circumbinary planet detected with radial velocities
• SOPHIE velocimetry of Kepler transit candidates XIV. A joint photometric, spectroscopic, and dynamical analysis of the Kepler-117 system
• Activity induced variation in spin-orbit angles as derived from Rossiter-McLaughlin measurements
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• Precise radial velocities of giant stars IX. HD 59686 Ab: a massive circumstellar planet orbiting a giant star in a ~13.6 au eccentric binary system
• Dynamics and habitability in circumstellar planetary systems of known binary stars
• An ablating super-Earth in an eccentric binary from the Dispersed Matter Planet Project
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• Secular Dynamics of S-type Planetary Orbits in Binary Star Systems: Applicability Domains of First- and Second-Order Theories
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• Kepler-1656b's Extreme Eccentricity: Signature of a Gentle Giant
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