Transiting exoplanets from the CoRoT space mission - X. CoRoT-10b: a giant planet in a 13.24 day eccentric orbit

Context. The space telescope CoRoT searches for transiting extrasolar planets by continuously monitoring the optical flux of thousands of stars in several fields of view. Aims. We report the discovery of CoRoT-10b, a giant planet on a highly eccentric orbit (e = 0.53 ± 0.04) revolving in 13.24 days around a faint (V = 15.22) metal-rich K1V star. Methods. We used CoRoT photometry, radial velocity observations taken with the HARPS spectrograph, and UVES spectra of the parent star to derive the orbital, stellar, and planetary parameters. Results. We derive a radius of the planet of 0.97 ± 0.07 RJup and a mass of 2.75 ± 0.16 MJup. The bulk density, ρp = 3.70 ± 0. 83 gc m −3 ,i s∼2.8 that of Jupiter. The core of CoRoT-10b could contain up to 240 M⊕ of heavy elements. Moving along its eccentric orbit, the planet experiences a 10.6-fold variation in insolation. Owing to the long circularisation time, τcirc > 7G yr, a resonant perturber is not required to excite and maintain the high eccentricity of CoRoT-10b.

[1]  D. W. Latham,et al.  HAT-P-15b: A 10.9 DAY EXTRASOLAR PLANET TRANSITING A SOLAR-TYPE STAR , 2010, 1005.5300.

[2]  A. Collier Cameron,et al.  Photospheric activity, rotation, and radial velocity variations of the planet-hosting star CoRoT-7 , 2010, 1005.3602.

[3]  C. Moutou,et al.  Observation of the full 12-hour-long transit of the exoplanet HD80606b. Warm-Spitzer photometry and SOPHIE spectroscopy , 2010, 1004.0790.

[4]  P. Gondoin,et al.  A transiting giant planet with a temperature between 250 K and 430 K , 2010, Nature.

[5]  P. Gondoin,et al.  Transiting exoplanets from the CoRoT space mission - IX. CoRoT-6b: a transiting “hot Jupiter” planet in an 8.9d orbit around a low-metallicity star , 2010, 1001.1426.

[6]  N. Iro,et al.  A TIME-DEPENDENT RADIATIVE MODEL FOR THE ATMOSPHERE OF THE ECCENTRIC EXOPLANETS , 2010, 1001.1171.

[7]  David K. Sing,et al.  Stellar limb-darkening coefficients for CoRot and Kepler , 2009, 0912.2274.

[8]  Adam Burrows,et al.  TIDAL HEATING MODELS FOR THE RADII OF THE INFLATED TRANSITING GIANT PLANETS WASP-4b, WASP-6b, WASP-12b, WASP-15b, AND TrES-4 , 2009, 0910.4394.

[9]  R. Paul Butler,et al.  Refined stellar, orbital and planetary parameters of the eccentric HAT‐P‐2 planetary system , 2009, 0908.1705.

[10]  P. Magain,et al.  The CoRoT space mission : early results Special feature Transiting exoplanets from the CoRoT space mission VII . The “ hot-Jupiter ”-type planet CoRoT-5 b , 2009 .

[11]  et al,et al.  The CoRoT space mission : early results Special feature Transiting exoplanets from the CoRoT space mission VIII . CoRoT-7 b : the first super-Earth with measured radius , 2009 .

[12]  C. Surace,et al.  EXO-DAT: AN INFORMATION SYSTEM IN SUPPORT OF THE CoRoT/EXOPLANET SCIENCE , 2009 .

[13]  J. Arlot,et al.  Strong tidal dissipation in Io and Jupiter from astrometric observations , 2009, Nature.

[14]  C. Moutou,et al.  Photometric and spectroscopic detection of the primary transit of the 111-day-period planet HD 80 606 b , 2009, 0902.4457.

[15]  M. Auvergne,et al.  The CoRoT satellite in flight : description and performance , 2009, 0901.2206.

[16]  UC Berkeley,et al.  HAT-P-11b: A SUPER-NEPTUNE PLANET TRANSITING A BRIGHT K STAR IN THE KEPLER FIELD , 2009, 0901.0282.

[17]  M. Barbieri,et al.  Characterization of the HD 17156 planetary system , 2008, 0812.0785.

[18]  Antonino Francesco Lanza,et al.  Magnetic activity in the photosphere of CoRoT-Exo-2a. Active longitudes and short-term spot cycle in , 2008, 0811.0461.

[19]  et al,et al.  Transiting exoplanets from the CoRoT space mission . VI. CoRoT-Exo-3b: the first secure inhabitant of the brown-dwarf desert , 2008, 0810.0919.

[20]  A. Collier Cameron,et al.  Transiting exoplanets from the CoRoT space mission. IV. CoRoT-Exo-4b: a transiting planet in a 9.2 d , 2008, 0807.3767.

[21]  E. al.,et al.  Transiting exoplanets from the CoRoT space mission V. CoRoT-Exo-4b: Stellar and planetary parameters ⋆ , 2008, 0807.3739.

[22]  G. Benedict,et al.  A Hubble Space Telescope Transit Light Curve For GJ 436B , 2008, 0806.0851.

[23]  F. Rasio,et al.  On the Origins of Eccentric Close-In Planets , 2008, Proceedings of the International Astronomical Union.

[24]  Joshua N. Winn,et al.  The Transit Light Curve Project. IX. Evidence for a Smaller Radius of the Exoplanet XO-3b , 2008, 0804.4475.

[25]  France.,et al.  Limits to the planet candidate GJ 436c , 2008, 0804.3030.

[26]  C. Moutou,et al.  Transiting exoplanets from the CoRoT space mission - II. CoRoT-Exo-2b: a transiting planet around an active G star , 2008, 0803.3207.

[27]  C. Moutou,et al.  Transiting exoplanets from the CoRoT space mission , 2008, Astronomy & Astrophysics.

[28]  P. Morel,et al.  CESAM: a free code for stellar evolution calculations , 2008, 0801.2019.

[29]  Peter R. McCullough,et al.  XO-3b: A Massive Planet in an Eccentric Orbit Transiting an F5 V Star , 2007, 0712.4283.

[30]  T. Guillot,et al.  The composition of transiting giant extrasolar planets , 2007, 0712.2500.

[31]  M. Barbieri,et al.  HD 17156b: A Transiting Planet with a 21.2 Day Period and an Eccentric Orbit , 2007, 0710.0898.

[32]  Portugal,et al.  Accurate Spitzer infrared radius measurement for the hot Neptune GJ 436b , 2007, 0707.2261.

[33]  C. Moutou,et al.  Radial velocity follow-up for confirmation and characterization of transiting exoplanets , 2007, Proceedings of the International Astronomical Union.

[34]  D. Queloz,et al.  Detection of transits of the nearby hot Neptune GJ 436 b , 2007, Astronomy & Astrophysics.

[35]  A. Sozzetti,et al.  HD 147506b: A Supermassive Planet in an Eccentric Orbit Transiting a Bright Star , 2007, 0705.0126.

[36]  E. Ford,et al.  Dynamical Outcomes of Planet-Planet Scattering , 2007, astro-ph/0703166.

[37]  G. Laughlin,et al.  Observational Consequences of Hydrodynamic Flows on Hot Jupiters , 2007, astro-ph/0702700.

[38]  T. Guillot,et al.  On the Origin of HD 149026b , 2006, astro-ph/0607212.

[39]  Á. Giménez.  Equations for the analysis of the light curves of extra-solar planetary transits , 2006 .

[40]  A. Bijaoui,et al.  Automated derivation of stellar atmospheric parameters and chemical abundances: the MATISSE algorithm , 2006, astro-ph/0604385.

[41]  Lionel Siess,et al.  Evolution of massive AGB stars: I.Carbon burning phase , 2006 .

[42]  F. Rasio,et al.  High Orbital Eccentricities of Extrasolar Planets Induced by the Kozai Mechanism , 2005, astro-ph/0502404.

[43]  Jean-Luis Lizon,et al.  Setting New Standards with HARPS , 2003 .

[44]  Cyril Cavadore,et al.  HARPS: ESO's coming planet searcher. Chasing exoplanets with the La Silla 3.6-m telescope , 2002 .

[45]  Francesco Marzari,et al.  Eccentric Extrasolar Planets: The Jumping Jupiter Model , 2002 .

[46]  D. Queloz,et al.  The CORALIE survey for southern extra-solar planets VII - Two short-period Saturnian companions to HD 108147 and HD 168746 , 2002, astro-ph/0202457.

[47]  T. Guillot.  THE INTERIORS OF GIANT PLANETS: Models and Outstanding Questions , 2001, astro-ph/0502068.

[48]  A. Cox,et al.  Allen's astrophysical quantities , 2000 .

[49]  D. Schlegel,et al.  Maps of Dust Infrared Emission for Use in Estimation of Reddening and Cosmic Microwave Background Radiation Foregrounds , 1998 .

[50]  D. Schlegel,et al.  Maps of Dust IR Emission for Use in Estimation of Reddening and CMBR Foregrounds , 1997, astro-ph/9710327.

[51]  Michel Mayor,et al.  ELODIE: A spectrograph for accurate radial velocity measurements , 1996 .

[52]  William H. Press,et al.  Numerical recipes in FORTRAN (2nd ed.): the art of scientific computing , 1992 .

[53]  M. Bessell,et al.  JHKLM PHOTOMETRY: STANDARD SYSTEMS, PASSBANDS, AND INTRINSIC COLORS , 1988 .

[54]  Á. Giménez,et al.  A new method for the analysis of apsidal motions in eclipsing binaries , 1983 .

[55]  J. Scargle.  Studies in astronomical time series analysis. II - Statistical aspects of spectral analysis of unevenly spaced data , 1982 .

[56]  S. Peale,et al.  The tides of Io , 1981 .

[57]  Yoshihide Kozai,et al.  Secular perturbations of asteroids with high inclination and eccentricity , 1962 .

[58]  H. Bruntt.  CoRoT space mission : early results Special feature Accurate fundamental parameters of CoRoT asteroseismic targets The solar-like stars HD 49933 , HD 175726 , HD 181420 , and HD 181906 , 2009 .

[59]  H. J. Deeg,et al.  The CoRoT space mission : early results Special feature Ground-based photometry of space-based transit detections : photometric follow-up of the CoRoT mission , 2009 .

[60]  Marc Ollivier,et al.  The CoRoT space mission : early results Special feature The CoRoT-7 planetary system : two orbiting super-Earths , 2009 .

[61]  K. Cheng,et al.  The eighth Pacific Rim conference on stellar astrophysics : a tribute to Kam-Ching Leung : proceedings of a workshop held at Merlin Beach Hotel, Phuket, Thailand, 5-9 May 2008 , 2009 .

[62]  Annie Baglin,et al.  COROT: A minisat for pionnier science, asteroseismology and planets finding , 2003 .

[63]  William H. Press,et al.  Book-Review - Numerical Recipes in Pascal - the Art of Scientific Computing , 1989 .

[64]  ACCEPTED FOR PUBLICATION IN THE ASTROPHYSICAL JOURNAL (2009 AUGUST 18) Preprint typeset using LATEX style emulateapj v. 10/09/06 THE TRANSIT INGRESS AND THE TILTED ORBIT OF THE EXTRAORDINARILY ECCENTRIC EXOPLANET HD 80606b , 2022 .

[65]  K. Flaherty,et al.  An Electronic Publication Dedicated to Early Stellar Evolution and Molecular Clouds Abstracts of Recently Accepted Papers V1647 Orionis: One Year into Quiescence Structure and Evolution of Super-earth to Super-jupiter Exoplanets: I. Heavy Element Enrichment in the Interior , 2022 .