KOI-200b and KOI-889b: two transiting exoplanets detected and characterized with Kepler, SOPHIE and HARPS-N

Abstract

We present the detection and characterization of the two new transiting, close-in, giant extrasolar planets KOI-200b and KOI-889b. They were first identified by the Kepler team as promising candidates from photometry of the Kepler satellite, then we established their planetary nature thanks to the radial velocity follow-up jointly secured with the spectrographs SOPHIE and HARPS-N. Combined analyses of the whole datasets allow the two planetary systems to be characterized. The planet KOI-200b has mass and radius of 0.68 +/- 0.09 M_Jup and 1.32 +/- 0.14 R_Jup; it orbits in 7.34 days a F8V host star with mass and radius of 1.40 (+0.14/-0.11) M_Sun and 1.51 +/- 0.14 R_Sun. KOI-889b is a massive planet with mass and radius of 9.9 +/- 0.5 M_Jup and 1.03 +/- 0.06 R_Jup; it orbits in 8.88 days an active G8V star with a rotation period of 19.2 +/- 0.3 days, and mass and radius of 0.88 +/- 0.06 M_Sun and 0.88 +/- 0.04 R_Sun. Both planets lie on eccentric orbits and are located just at the frontier between regimes where the tides can explain circularization and where tidal effects are negligible. The two planets are among the first ones detected and characterized thanks to observations secured with HARPS-N, the new spectrograph recently mounted at the Telescopio Nazionale Galileo. These results illustrate the benefits that could be obtained from joint studies using two spectrographs as SOPHIE and HARPS-N.

10 pages, 4 figures, 4 tables, accepted for publication in A&A

References in corpus (13)

• The false positive rate of Kepler and the occurrence of planets
• SOPHIE velocimetry of Kepler transit candidates VII. A false-positive rate of 35% for Kepler close-in giant exoplanet candidates
• SOPHIE+: First results of an octagonal-section fiber for high-precision radial velocity measurements
• The effect of stellar limb darkening values on the accuracy of the planet radii derived from photometric transit observations
• The GAPS programme with HARPS-N at TNG. I: Observations of the Rossiter-McLaughlin effect and characterisation of the transiting system Qatar-1
• WASP-52b, WASP-58b, WASP-59b, and WASP-60b: four new transiting close-in giant planets
• On The Origins Of Eccentric Close-in Planets
• A Gas Giant Circumbinary Planet Transiting the F Star Primary of the Eclipsing Binary Star KIC 4862625 and the Independent Discovery and Characterization of the two transiting planets in the Kepler-47 System
• SOPHIE velocimetry of Kepler transit candidates. VIII. KOI-205 b: a brown-dwarf companion to a K-type dwarf
• The GAPS Programme with HARPS-N@TNG II: No giant planets around the metal-poor star HIP 11952
• Constraining the False Positive Rate for Kepler Planet Candidates with Multi-Color Photometry from the GTC
• Gravity Darkening in Binary Stars
• SOPHIE velocimetry of Kepler transit candidates II. KOI-428b: a hot Jupiter transiting a subgiant F-star

Cited by in corpus (30)

• Revised Stellar Properties of Kepler Targets for the Quarter 1-16 Transit Detection Run
• 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
• Planetary Candidates Observed by Kepler VI: Planet Sample from Q1-Q16 (47 Months)
• Exploring Exoplanet Populations with NASA's Kepler Mission
• Planetary Candidates Observed by Kepler IV: Planet Sample From Q1-Q8 (22 Months)
• BANYAN. VII. A New Population of Young Substellar Candidate Members of Nearby Moving Groups from the BASS Survey
• PASTIS: Bayesian extrasolar planet validation. I. General framework, models, and performance
• Kepler-413b: a slightly misaligned, Neptune-size transiting circumbinary planet
• Ab initio equations of state for hydrogen (H-REOS.3) and helium (He-REOS.3) and their implications for the interior of Brown Dwarfs
• A paucity of proto-hot Jupiters on super-eccentric orbits
• SOPHIE velocimetry of Kepler transit candidates XII. KOI-1257 b: a highly eccentric three-month period transiting exoplanet
• High-precision stellar limb-darkening in exoplanetary transits
• HATS-70b: A 13 Mjup brown dwarf transiting an A star
• Kepler-432 b: a massive planet in a highly eccentric orbit transiting a red giant
• The Densities of Planets in Multiple Stellar Systems
• Improved parameters of seven Kepler giant companions characterized with SOPHIE and HARPS-N
• New transiting hot Jupiters discovered by WASP-South, Euler/CORALIE and TRAPPIST-South
• Starspot occultations in infrared transit spectroscopy: the case of WASP-52b
• Interplay of tidal evolution and stellar wind braking in the rotation of stars hosting massive close-in planets
• Tracking Advanced Planetary Systems with HARPS-N (TAPAS). I. A multiple planetary system around the red giant star TYC 1422-614-1
• Material Properties for the Interiors of Massive Giant Planets and Brown Dwarfs
• Beyond the exoplanet mass-radius relation
• Transiting exoplanets from the CoRoT space mission XXV. CoRoT-27b: a massive and dense planet on a short-period orbit
• Characterization of the four new transiting planets KOI-188b, KOI-195b, KOI-192b, and KOI-830b
• Stellar obliquities and magnetic activities of Planet-Hosting Stars and Eclipsing Binaries based on Transit Chord Correlation
• Variability induced motion in Kepler data
• Two transiting hot Jupiters from the WASP survey: WASP-150b and WASP-176b
• AutoRegressive Planet Search: Feasibility Study for Irregular Time Series
• Production of hot Jupiter candidates from high-eccentricity mechanisms for different initial planetary mass configurations