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1. Transiting exoplanets from the CoRoT space mission - XIX. CoRoT-23b: a dense hot Jupiter on an eccentric orbit

Author

Sz. Csizmadia, Aviv Ofir, Pierre Barge, C. Moutou, Michaël Gillon, M. Ollivier, Sylvio Ferraz-Mello, Roi Alonso, Rodrigo F. Díaz, B. Samuel, Tsevi Mazeh, Suzanne Aigrain, Jean Schneider, Alexandre Santerne, Heike Rauer, M. Havel, Anders Erikson, Helmut Lammer, G. Wuchterl, Aldo S. Bonomo, Didier Queloz, C. Cavarroc, Laurent Jorda, Antoine Llebaria, Daniel Rouan, Pascal Bordé, Davide Gandolfi, Rudolf Dvorak, Tristan Guillot, A. Léger, C. Lovis, Magali Deleuil, François Bouchy, Hannu Parviainen, Martin Pätzold, B. Tingley, M. Fridlund, Artie P. Hatzes, Annie Baglin, Guillaume Hébrard, Michel Auvergne, Juan Cabrera, Hans J. Deeg, Joseph Louis LAGRANGE (LAGRANGE), Université Côte d'Azur (UCA)-Université Nice Sophia Antipolis (... - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Observatoire de la Côte d'Azur, Université Côte d'Azur (UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Astrophysique de Marseille (LAM), Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS), Institut d'Astrophysique et de Géophysique [Liège], Université de Liège, Laboratoire des technologies de la microélectronique (LTM), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS), Universität zu Köln, Université Joseph Fourier - Grenoble 1 (UJF)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS), and Universität zu Köln = University of Cologne

Subjects
010504 meteorology & atmospheric sciences, [PHYS.ASTR.EP]Physics [physics]/Astrophysics [astro-ph]/Earth and Planetary Astrophysics [astro-ph.EP], media_common.quotation_subject, [SDU.ASTR.EP]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Earth and Planetary Astrophysics [astro-ph.EP], FOS: Physical sciences, Orbital eccentricity, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, FOTOMETRIA, 01 natural sciences, techniques: spectroscopic – techniques: photometric – stars: fundamental parameters – planetary systems – techniques: radial velocities, Planet, 0103 physical sciences, Hot Jupiter, Astrophysics::Solar and Stellar Astrophysics, Eccentricity (behavior), 010303 astronomy & astrophysics, ComputingMilieux_MISCELLANEOUS, Astrophysics::Galaxy Astrophysics, 0105 earth and related environmental sciences, media_common, Physics, Earth and Planetary Astrophysics (astro-ph.EP), [PHYS]Physics [physics], Subgiant, Astronomy and Astrophysics, Exoplanet, Radial velocity, 13. Climate action, Space and Planetary Science, Astrophysics::Earth and Planetary Astrophysics, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], Planetary mass, Astrophysics - Earth and Planetary Astrophysics
Abstract

We report the detection of CoRoT-23b, a hot Jupiter transiting in front of its host star with a period of 3.6314 \pm 0.0001 days. This planet was discovered thanks to photometric data secured with the CoRoT satellite, combined with spectroscopic radial velocity (RV) measurements. A photometric search for possible background eclipsing binaries conducted at CFHT and OGS concluded with a very low risk of false positives. The usual techniques of combining RV and transit data simultaneously were used to derive stellar and planetary parameters. The planet has a mass of Mp = 2.8 \pm 0.3 MJup, a radius of Rpl = 1.05 \pm 0.13 RJup, a density of \approx 3 g cm-3. RV data also clearly reveal a non zero eccentricity of e = 0.16 \pm 0.02. The planet orbits a mature G0 main sequence star of V =15.5 mag, with a mass M\star = 1.14 \pm 0.08 M\odot, a radius R\star = 1. 61 \pm 0.18 R\odot and quasi-solar abundances. The age of the system is evaluated to be 7 Gyr, not far from the transition to subgiant, in agreement with the rather large stellar radius. The two features of a significant eccentricity of the orbit and of a fairly high density are fairly uncommon for a hot Jupiter. The high density is, however, consistent with a model of contraction of a planet at this mass, given the age of the system. On the other hand, at such an age, circularization is expected to be completed. In fact, we show that for this planetary mass and orbital distance, any initial eccentricity should not totally vanish after 7 Gyr, as long as the tidal quality factor Qp is more than a few 105, a value that is the lower bound of the usually expected range. Even if Corot-23b features a density and an eccentricity that are atypical of a hot Jupiter, it is thus not an enigmatic object., Astronomy & Astrophysics in press

Published
2011
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2. Transiting exoplanets from the CoRoT space mission XIV. CoRoT-11b: a transiting massive 'hot-Jupiter' in a prograde orbit around a rapidly rotating F-type star

Author

Sz. Csizmadia, P. Eigmüller, Michael Endl, M. Fridlund, Suzanne Aigrain, François Bouchy, Annie Baglin, Artie P. Hatzes, M. Ollivier, H. Bruntt, William D. Cochran, Sylvio Ferraz-Mello, Tsevi Mazeh, Didier Queloz, B. Samuel, P. Gondoin, M. Havel, C. Moutou, Roi Alonso, G. Wuchterl, Petr Kabath, Tristan Guillot, Michaël Gillon, Aldo S. Bonomo, Hans J. Deeg, Martin Pätzold, Daniel Rouan, Antoine Llebaria, Neale P. Gibson, Jochen Eislöffel, S. Carpano, Rudolf Dvorak, Jean Schneider, J. C. Gazzano, Michel Mayor, Pascal Bordé, Pierre Barge, Heike Rauer, Helmut Lammer, Anders Erikson, M. Hartmann, A. Léger, Laurent Jorda, Magali Deleuil, Juan Cabrera, Phillip J. MacQueen, Ludmila Carone, E. W. Guenther, Guillaume Hébrard, B. Stecklum, Michel Auvergne, Stéphane Udry, Brandon Tingley, Francesco Pepe, Davide Gandolfi, Laboratoire de Cosmologie, Astrophysique Stellaire & Solaire, de Planétologie et de Mécanique des Fluides (CASSIOPEE), Université Nice Sophia Antipolis (... - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de la Côte d'Azur, and Université Côte d'Azur (UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Université Côte d'Azur (UCA)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Dwarf star, planetary systems, techniques: photometric, techniques: radial velocities, techniques: spectroscopic, Astronomy and Astrophysics, Space and Planetary Science, Extrasolare Planeten, FOS: Physical sciences, Photometrie, Astrophysics, 01 natural sciences, Planet, 0103 physical sciences, Hot Jupiter, 010306 general physics, 010303 astronomy & astrophysics, ComputingMilieux_MISCELLANEOUS, Earth and Planetary Astrophysics (astro-ph.EP), Physics, Orbital period, Radialgeschwindigkeit, Exoplanet, Radial velocity, Stars, 13. Climate action, Planetary mass, Astrophysics - Earth and Planetary Astrophysics
Abstract

The CoRoT exoplanet science team announces the discovery of CoRoT-11b, a fairly massive hot-Jupiter transiting a V=12.9 mag F6 dwarf star (M*=1.27 +/- 0.05 Msun, R*=1.37 +/- 0.03 Rsun, Teff=6440 +/- 120 K), with an orbital period of P=2.994329 +/- 0.000011 days and semi-major axis a=0.0436 +/- 0.005 AU. The detection of part of the radial velocity anomaly caused by the Rossiter-McLaughlin effect shows that the transit-like events detected by CoRoT are caused by a planet-sized transiting object in a prograde orbit. The relatively high projected rotational velocity of the star (vsini=40+/-5 km/s) places CoRoT-11 among the most rapidly rotating planet host stars discovered so far. With a planetary mass of mp=2.33+/-0.34 Mjup and radius rp=1.43+/-0.03 Rjup, the resulting mean density of CoRoT-11b (rho=0.99+/-0.15 g/cm^3) can be explained with a model for an inflated hydrogen-planet with a solar composition and a high level of energy dissipation in its interior., Comment: 15 pages, 13 figures, accepted for publication in A&A

Published
2010
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3. Transiting exoplanets from the CoRoT space mission VI. CoRoT-Exo-3b: the first secure inhabitant of the brown-dwarf desert

Author

M. Deleuil, H. J. Deeg, R. Alonso, F. Bouchy, D. Rouan, M. Auvergne, A. Baglin, S. Aigrain, J. M. Almenara, M. Barbieri, P. Barge, H. Bruntt, P. Bordé, A. Collier Cameron, Sz. Csizmadia, R. De la Reza, R. Dvorak, A. Erikson, M. Fridlund, D. Gandolfi, M. Gillon, E. Guenther, T. Guillot, A. Hatzes, G. Hébrard, L. Jorda, H. Lammer, A. Léger, A. Llebaria, B. Loeillet, M. Mayor, T. Mazeh, C. Moutou, M. Ollivier, M. Pätzold, F. Pont, D. Queloz, H. Rauer, J. Schneider, A. Shporer, G. Wuchterl, S. Zucker, Laboratoire de Cosmologie, Astrophysique Stellaire & Solaire, de Planétologie et de Mécanique des Fluides (CASSIOPEE), Université Nice Sophia Antipolis (... - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de la Côte d'Azur, Université Côte d'Azur (UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Université Côte d'Azur (UCA)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Astrophysique de Marseille (LAM), Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS), Instituto de Astrofísica de Canarias (IAC), Institut d'Astrophysique de Paris (IAP), Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Pôle Astronomie du LESIA, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, School of Physics, University of Exeter, School of physics, University of New South Wales, Institut d'astrophysique spatiale (IAS), Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), School of Physics and Astronomy, University of St Andrews, Institute of Planetary Research, Deutsches Zentrum für Luft- und Raumfahrt (DLR), Observatório Nacional/MCTI, Institut für Astronomie, Universität Wien (IfA), Research and Scientific Support Department, ESA-ESTEC (RSSD), Thüringer Landessternwarte, Tautenburg Observatory, Observatoire Astronomique de l'Université de Genève, Observatoire de la Côte d'Azur (OCA), Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Institut für Weltraumforschung, Österreichische Akademie der Wissenschaften (IWF), School of Physics and Astronomy, Raymond and Beverly Sackler Faculty of Exact Sciences, Tel Aviv University, Rheinisches Institut für Umweltforschung an der Universität zu Köln (RIU), Laboratoire Univers et Théories (LUTH (UMR_8102)), and Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris

Subjects
photometry, Population, Brown dwarf, FOS: Physical sciences, Astrophysics, 01 natural sciences, Planet, 0103 physical sciences, Substellar object, education, 010303 astronomy & astrophysics, brown dwarf, Physics, education.field_of_study, [SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph], 010308 nuclear & particles physics, Astrophysics (astro-ph), Astronomy and Astrophysics, Surface gravity, Light curve, Orbital period, Exoplanet, CoRoT, exoplanets, transit method, [SDU]Sciences of the Universe [physics], Space and Planetary Science, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]
Abstract

Context. The CoRoT space mission routinely provides high-precision photometric measurements of thousands of stars that have been continuously observed for months. Aims. The discovery and characterization of the first very massive transiting planetary companion with a short orbital period is reported. Methods. A series of 34 transits was detected in the CoRoT light curve of an F3V star, observed from May to October 2007 for 152 days. The radius was accurately determined and the mass derived for this new transiting, thanks to the combined analysis of the light curve and complementary ground-based observations: high-precision radial-velocity measurements, on-off photometry, and high signal-to-noise spectroscopic observations. Results. CoRoT-Exo-3b has a radius of 1.01+-0.07 RJup and transits around its F3-type primary every 4.26 days in a synchronous orbit. Its mass of 21.66+-1.0 MJup, density of 26.4+-5.6 g cm^-3, and surface gravity of log g = 4.72 clearly distinguish it from the regular close-in planet population, making it the most intriguing transiting substellar object discovered so far. Conclusions. With the current data, the nature of CoRoT-Exo-3b is ambiguous, as it could either be a low-mass brown-dwarf or a member of a new class of "superplanets". Its discovery may help constrain the evolution of close-in planets and brown-dwarfs better. Finally, CoRoT-Exo-3b confirms the trend that massive transiting giant planets (M >= 4 MJup) are found preferentially around more massive stars than the Sun., 11 pages, 12 figures, accepted for A&A

Published
2008
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4. Transiting exoplanets from the CoRoT space mission

Author

Barge, P, Baglin, A, Auvergne, M, Rauer, H, Leger, A, Schneider, J, Pont, F, Aigrain, S, Almenara, J-M, Alonso, R, Barbieri, M, Borde, P, Bouchy, F, Deeg, HJ, Deleuil, M, Dvorak, R, Erikson, A, Fridlund, M, Gillon, M, Gondoin, P, Guillot, T, Hatzes, A, Hebrard, G, Jorda, L, Kabath, P, Lammer, H, Llebaria, A, Loeillet, B, Magain, P, Mazeh, T, Moutou, C, Ollivier, M, Paetzold, M, Queloz, D, Rouan, D, Shporer, A, and Wuchterl, G

Published
2008

5. Transiting exoplanets from the CoRoT space mission

Author

Alonso, R, Auvergne, M, Baglin, A, Ollivier, M, Moutou, C, Rouan, D, Deeg, HJ, Aigrain, S, Almenara, JM, Barbieri, M, Barge, P, Benz, W, Borde, P, Bouchy, F, De la Reza, R, Deleuil, M, Dvorak, R, Erikson, A, Fridlund, M, Gillon, M, Gondoin, P, Guillot, T, Hatzes, A, Hebrard, G, Kabath, P, Jorda, L, Lammer, H, Leger, A, Llebaria, A, Loeillet, B, Magain, P, Mayor, M, Mazeh, T, Paetzold, M, Pepe, F, Pont, F, Queloz, D, Rauer, H, Shporer, A, Schneider, J, Stecklum, B, Udry, S, and Wuchterl, G

Published
2008

6. Transiting exoplanets from the CoRoT space mission

Author

Bonomo, A. S., primary, Santerne, A., additional, Alonso, R., additional, Gazzano, J.-C., additional, Havel, M., additional, Aigrain, S., additional, Auvergne, M., additional, Baglin, A., additional, Barbieri, M., additional, Barge, P., additional, Benz, W., additional, Bordé, P., additional, Bouchy, F., additional, Bruntt, H., additional, Cabrera, J., additional, Cameron, A. C., additional, Carone, L., additional, Carpano, S., additional, Csizmadia, Sz., additional, Deleuil, M., additional, Deeg, H. J., additional, Dvorak, R., additional, Erikson, A., additional, Ferraz-Mello, S., additional, Fridlund, M., additional, Gandolfi, D., additional, Gillon, M., additional, Guenther, E., additional, Guillot, T., additional, Hatzes, A., additional, Hébrard, G., additional, Jorda, L., additional, Lammer, H., additional, Lanza, A. F., additional, Léger, A., additional, Llebaria, A., additional, Mayor, M., additional, Mazeh, T., additional, Moutou, C., additional, Ollivier, M., additional, Pätzold, M., additional, Pepe, F., additional, Queloz, D., additional, Rauer, H., additional, Rouan, D., additional, Samuel, B., additional, Schneider, J., additional, Tingley, B., additional, Udry, S., additional, and Wuchterl, G., additional

Published
2010
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7. Transiting exoplanets from the CoRoT space mission

Author

Gillon, M., primary, Hatzes, A., additional, Csizmadia, Sz., additional, Fridlund, M., additional, Deleuil, M., additional, Aigrain, S., additional, Alonso, R., additional, Auvergne, M., additional, Baglin, A., additional, Barge, P., additional, Barnes, S. I., additional, Bonomo, A. S., additional, Bordé, P., additional, Bouchy, F., additional, Bruntt, H., additional, Cabrera, J., additional, Carone, L., additional, Carpano, S., additional, Cochran, W. D., additional, Deeg, H. J., additional, Dvorak, R., additional, Endl, M., additional, Erikson, A., additional, Ferraz-Mello, S., additional, Gandolfi, D., additional, Gazzano, J. C., additional, Guenther, E., additional, Guillot, T., additional, Havel, M., additional, Hébrard, G., additional, Jorda, L., additional, Léger, A., additional, Llebaria, A., additional, Lammer, H., additional, Lovis, C., additional, Mayor, M., additional, Mazeh, T., additional, Montalbán, J., additional, Moutou, C., additional, Ofir, A., additional, Ollivier, M., additional, Pätzold, M., additional, Pepe, F., additional, Queloz, D., additional, Rauer, H., additional, Rouan, D., additional, Samuel, B., additional, Santerne, A., additional, Schneider, J., additional, Tingley, B., additional, Udry, S., additional, Weingrill, J., additional, and Wuchterl, G., additional

Published
2010
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8. Transiting exoplanets from the CoRoT space mission

Author

Fridlund, M., primary, Hébrard, G., additional, Alonso, R., additional, Deleuil, M., additional, Gandolfi, D., additional, Gillon, M., additional, Bruntt, H., additional, Alapini, A., additional, Csizmadia, Sz., additional, Guillot, T., additional, Lammer, H., additional, Aigrain, S., additional, Almenara, J. M., additional, Auvergne, M., additional, Baglin, A., additional, Barge, P., additional, Bordé, P., additional, Bouchy, F., additional, Cabrera, J., additional, Carone, L., additional, Carpano, S., additional, Deeg, H. J., additional, De la Reza, R., additional, Dvorak, R., additional, Erikson, A., additional, Ferraz-Mello, S., additional, Guenther, E., additional, Gondoin, P., additional, den Hartog, R., additional, Hatzes, A., additional, Jorda, L., additional, Léger, A., additional, Llebaria, A., additional, Magain, P., additional, Mazeh, T., additional, Moutou, C., additional, Ollivier, M., additional, Pätzold, M., additional, Queloz, D., additional, Rauer, H., additional, Rouan, D., additional, Samuel, B., additional, Schneider, J., additional, Shporer, A., additional, Stecklum, B., additional, Tingley, B., additional, Weingrill, J., additional, and Wuchterl, G., additional

Published
2010
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9. Transit timing analysis of CoRoT-1b

Author

Csizmadia, Sz., primary, Renner, S., additional, Barge, P., additional, Agol, E., additional, Aigrain, S., additional, Alonso, R., additional, Almenara, J.-M., additional, Bonomo, A. S., additional, Bordé, P., additional, Bouchy, F., additional, Cabrera, J., additional, Deeg, H. J., additional, De la Reza, R., additional, Deleuil, M., additional, Dvorak, R., additional, Erikson, A., additional, Guenther, E. W., additional, Fridlund, M., additional, Gondoin, P., additional, Guillot, T., additional, Hatzes, A., additional, Jorda, L., additional, Lammer, H., additional, Lázaro, C., additional, Léger, A., additional, Llebaria, A., additional, Magain, P., additional, Moutou, C., additional, Ollivier, M., additional, Pätzold, M., additional, Queloz, D., additional, Rauer, H., additional, Rouan, D., additional, Schneider, J., additional, Wuchterl, G., additional, and Gandolfi, D., additional

Published
2010
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10. Transiting exoplanets from the CoRoT space mission *

Author

Léger, A., Rouan, D., Schneider, J., Barge, P., Fridlund, M., Samuel, B., Ollivier, M., Guenther, E., Deleuil, M., Deeg, H. J., Auvergne, M., Alonso, R., Aigrain, S., Alapini, A., Almenara, J. M., Baglin, A., Barbieri, M., Bruntt, H., Bordé, P., Bouchy, F., Cabrera, J., Catala, C., Carone, L., Carpano, S., Csizmadia, Sz., Dvorak, R., Erikson, A., Ferraz-Mello, S., Foing, B., Fressin, F., Gandolfi, D., Gillon, M., Gondoin, Ph., Grasset, O., Guillot, T., Hatzes, A., Hébrard, G., Jorda, L., Lammer, H., Llebaria, A., Loeillet, B., Mayor, M., Mazeh, T., Moutou, C., Pätzold, M., Pont, F., Queloz, D., Rauer, H., Renner, S., Samadi, R., Shporer, A., Sotin, Ch., Tingley, B., Wuchterl, G., Adda, M., Agogu, P., Appourchaux, T., Ballans, H., Baron, P., Beaufort, T., Bellenger, R., Berlin, R., Bernardi, P., Blouin, D., Baudin, F., Bodin, P., Boisnard, L., Boit, L., Bonneau, F., Borzeix, S., Briet, R., Buey, J.-T., Butler, B., Cailleau, D., Cautain, R., Chabaud, P.-Y., Chaintreuil, S., Chiavassa, F., Costes, V., Cuna Parrho, V., De Oliveira Fialho, F., Decaudin, M., Defise, J.-M., Djalal, S., Epstein, G., Exil, G.-E., Fauré, C., Fenouillet, T., Gaboriaud, A., Gallic, A., Gamet, P., Gavalda, P., Grolleau, E., Gruneisen, R., Gueguen, L., Guis, V., Guivarc'h, V., Guterman, P., Hallouard, D., Hasiba, J., Heuripeau, F., Huntzinger, G., Hustaix, H., Imad, C., Imbert, C., Johlander, B., Jouret, M., Journoud, P., Karioty, F., Kerjean, L., Lafaille, V., Lafond, L., Lam-Trong, T., Landiech, P., Lapeyrere, V., Larqué, T., Laudet, P., Lautier, N., Lecann, H., Lefevre, L., Leruyet, B., Levacher, P., Magnan, A., Mazy, E., Mertens, F., Mesnager, J.-M., Meunier, J.-C., Michel, J.-P., Monjoin, W., Naudet, D., Nguyen-Kim, K., Orcesi, J.-L., Ottacher, H., Perez, R., Peter, G., Plasson, P., Plesseria, J.-Y., Pontet, B., Pradines, A., Quentin, C., Reynaud, J.-L., Rolland, G., Rollenhagen, F., Romagnan, R., Russ, N., Schmidt, R., Schwartz, N., Sebbag, I., Sedes, G., Smit, H., Steller, M. B., Sunter, W., Surace, C., Tello, M., Tiphène, D., Toulouse, P., Ulmer, B., Vandermarcq, O., Vergnault, E., Vuillemin, A., Zanatta, P., Léger, A., Rouan, D., Schneider, J., Barge, P., Fridlund, M., Samuel, B., Ollivier, M., Guenther, E., Deleuil, M., Deeg, H. J., Auvergne, M., Alonso, R., Aigrain, S., Alapini, A., Almenara, J. M., Baglin, A., Barbieri, M., Bruntt, H., Bordé, P., Bouchy, F., Cabrera, J., Catala, C., Carone, L., Carpano, S., Csizmadia, Sz., Dvorak, R., Erikson, A., Ferraz-Mello, S., Foing, B., Fressin, F., Gandolfi, D., Gillon, M., Gondoin, Ph., Grasset, O., Guillot, T., Hatzes, A., Hébrard, G., Jorda, L., Lammer, H., Llebaria, A., Loeillet, B., Mayor, M., Mazeh, T., Moutou, C., Pätzold, M., Pont, F., Queloz, D., Rauer, H., Renner, S., Samadi, R., Shporer, A., Sotin, Ch., Tingley, B., Wuchterl, G., Adda, M., Agogu, P., Appourchaux, T., Ballans, H., Baron, P., Beaufort, T., Bellenger, R., Berlin, R., Bernardi, P., Blouin, D., Baudin, F., Bodin, P., Boisnard, L., Boit, L., Bonneau, F., Borzeix, S., Briet, R., Buey, J.-T., Butler, B., Cailleau, D., Cautain, R., Chabaud, P.-Y., Chaintreuil, S., Chiavassa, F., Costes, V., Cuna Parrho, V., De Oliveira Fialho, F., Decaudin, M., Defise, J.-M., Djalal, S., Epstein, G., Exil, G.-E., Fauré, C., Fenouillet, T., Gaboriaud, A., Gallic, A., Gamet, P., Gavalda, P., Grolleau, E., Gruneisen, R., Gueguen, L., Guis, V., Guivarc'h, V., Guterman, P., Hallouard, D., Hasiba, J., Heuripeau, F., Huntzinger, G., Hustaix, H., Imad, C., Imbert, C., Johlander, B., Jouret, M., Journoud, P., Karioty, F., Kerjean, L., Lafaille, V., Lafond, L., Lam-Trong, T., Landiech, P., Lapeyrere, V., Larqué, T., Laudet, P., Lautier, N., Lecann, H., Lefevre, L., Leruyet, B., Levacher, P., Magnan, A., Mazy, E., Mertens, F., Mesnager, J.-M., Meunier, J.-C., Michel, J.-P., Monjoin, W., Naudet, D., Nguyen-Kim, K., Orcesi, J.-L., Ottacher, H., Perez, R., Peter, G., Plasson, P., Plesseria, J.-Y., Pontet, B., Pradines, A., Quentin, C., Reynaud, J.-L., Rolland, G., Rollenhagen, F., Romagnan, R., Russ, N., Schmidt, R., Schwartz, N., Sebbag, I., Sedes, G., Smit, H., Steller, M. B., Sunter, W., Surace, C., Tello, M., Tiphène, D., Toulouse, P., Ulmer, B., Vandermarcq, O., Vergnault, E., Vuillemin, A., and Zanatta, P.

Abstract

Aims. We report the discovery of very shallow ($\Delta F/F \approx 3.4\times 10^{-4}$), periodic dips in the light curve of an active $V = 11.7$G9V star observed by the CoRoT  satellite, which we interpret as caused by a transiting companion. We describe the 3-colour CoRoT data and complementary ground-based observations that support the planetary nature of the companion.

Published
2009
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11. The CoRoT-7 planetary system: two orbiting super-Earths ***

Author

Queloz, D., Bouchy, F., Moutou, C., Hatzes, A., Hébrard, G., Alonso, R., Auvergne, M., Baglin, A., Barbieri, M., Barge, P., Benz, W., Bordé, P., Deeg, H. J., Deleuil, M., Dvorak, R., Erikson, A., Ferraz Mello, S., Fridlund, M., Gandolfi, D., Gillon, M., Guenther, E., Guillot, T., Jorda, L., Hartmann, M., Lammer, H., Léger, A., Llebaria, A., Lovis, C., Magain, P., Mayor, M., Mazeh, T., Ollivier, M., Pätzold, M., Pepe, F., Rauer, H., Rouan, D., Schneider, J., Segransan, D., Udry, S., Wuchterl, G., Queloz, D., Bouchy, F., Moutou, C., Hatzes, A., Hébrard, G., Alonso, R., Auvergne, M., Baglin, A., Barbieri, M., Barge, P., Benz, W., Bordé, P., Deeg, H. J., Deleuil, M., Dvorak, R., Erikson, A., Ferraz Mello, S., Fridlund, M., Gandolfi, D., Gillon, M., Guenther, E., Guillot, T., Jorda, L., Hartmann, M., Lammer, H., Léger, A., Llebaria, A., Lovis, C., Magain, P., Mayor, M., Mazeh, T., Ollivier, M., Pätzold, M., Pepe, F., Rauer, H., Rouan, D., Schneider, J., Segransan, D., Udry, S., and Wuchterl, G.

Abstract

We report on an intensive observational campaign carried out with HARPS at the 3.6 m telescope at La Silla on the star CoRoT-7. Additional simultaneous photometric measurements carried out with the Euler Swiss telescope have demonstrated that the observed radial velocity variations are dominated by rotational modulation from cool spots on the stellar surface. Several approaches were used to extract the radial velocity signal of the planet(s) from the stellar activity signal. First, a simple pre-whitening procedure was employed to find and subsequently remove periodic signals from the complex frequency structure of the radial velocity data. The dominant frequency in the power spectrum was found at 23  days, which corresponds to the rotation period of CoRoT-7. The 0.8535 day period of CoRoT-7b planetary candidate was detected with an amplitude of 3.3 m s-1. Most other frequencies, some with amplitudes larger than the CoRoT-7b signal, are most likely associated with activity. A second approach used harmonic decomposition of the rotational period and up to the first three harmonics to filter out the activity signal from radial velocity variations caused by orbiting planets. After correcting the radial velocity data for activity, two periodic signals are detected: the CoRoT-7b  transit period and a second one with a period of 3.69 days and an amplitude of 4 m s-1. This second signal was also found in the pre-whitening analysis. We attribute the second signal to a second, more remote planet CoRoT-7c . The orbital solution of both planets is compatible with circular orbits. The mass of CoRoT-7b is $4.8\pm0.8$($M_{\oplus}$) and that of CoRoT-7c is $8.4\pm 0.9$($M_{\oplus}$), assuming both planets are on coplanar orbits. We also investigated the false positive scenario of a blend by a faint stellar binary, and this may be rejected by the stability of the bisector on a nightly scale. According to their masses both planets belong to the super-Earth planet category. The average density of CoRoT-7b is $\rho=5.6\pm 1.3\mathrm{\,g\,cm^{-3}}$, similar to the Earth. The CoRoT-7 planetary system provides us with the first insight into the physical nature of short period super-Earth planets recently detected by radial velocity surveys. These planets may be denser than Neptune and therefore likely made of rocks like the Earth, or a mix of water ice and rocks.

Published
2009
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12. Removing systematics from the CoRoT light curves*

Author

Mazeh, T., Guterman, P., Aigrain, S., Zucker, S., Grinberg, N., Alapini, A., Alonso, R., Auvergne, M., Barbieri, M., Barge, P., Bordé, P., Bouchy, F., Deeg, H., De la Reza, R., Deleuil, M., Dvorak, R., Erikson, A., Fridlund, M., Gondoin, P., Jorda, L., Lammer, H., Léger, A., Llebaria, A., Magain, P., Moutou, C., Ollivier, M., Pätzold, M., Pont, F., Queloz, D., Rauer, H., Rouan, D., Sabo, R., Schneider, J., Wuchterl, G., Mazeh, T., Guterman, P., Aigrain, S., Zucker, S., Grinberg, N., Alapini, A., Alonso, R., Auvergne, M., Barbieri, M., Barge, P., Bordé, P., Bouchy, F., Deeg, H., De la Reza, R., Deleuil, M., Dvorak, R., Erikson, A., Fridlund, M., Gondoin, P., Jorda, L., Lammer, H., Léger, A., Llebaria, A., Magain, P., Moutou, C., Ollivier, M., Pätzold, M., Pont, F., Queloz, D., Rauer, H., Rouan, D., Sabo, R., Schneider, J., and Wuchterl, G.

Abstract

This paper presents an analysis that searched for systematic effects within the CoRoT exoplanet field light curves. The analysis identified a systematic effect that modified the zero point of most CoRoT exposures as a function of stellar magnitude. We could find this effect only after preparing a set of learning light curves that were relatively free of stellar and instrumental noise. Correcting for this effect, rejecting outliers that appear in almost every exposure, and applying SysRem, reduced the stellar RMS by about 20%, without attenuating transit signals.

Published
2009
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13. The secondary eclipse of CoRoT-1b*

Author

Alonso, R., Alapini, A., Aigrain, S., Auvergne, M., Baglin, A., Barbieri, M., Barge, P., Bonomo, A. S., Bordé, P., Bouchy, F., Chaintreuil, S., De la Reza, R., Deeg, H. J., Deleuil, M., Dvorak, R., Erikson, A., Fridlund, M., De Oliveira Fialho, F., Gondoin, P., Guillot, T., Hatzes, A., Jorda, L., Lammer, H., Léger, A., Llebaria, A., Magain, P., Mazeh, T., Moutou, C., Ollivier, M., Pätzold, M., Pont, F., Queloz, D., Rauer, H., Rouan, D., Schneider, J., Wuchterl, G., Alonso, R., Alapini, A., Aigrain, S., Auvergne, M., Baglin, A., Barbieri, M., Barge, P., Bonomo, A. S., Bordé, P., Bouchy, F., Chaintreuil, S., De la Reza, R., Deeg, H. J., Deleuil, M., Dvorak, R., Erikson, A., Fridlund, M., De Oliveira Fialho, F., Gondoin, P., Guillot, T., Hatzes, A., Jorda, L., Lammer, H., Léger, A., Llebaria, A., Magain, P., Mazeh, T., Moutou, C., Ollivier, M., Pätzold, M., Pont, F., Queloz, D., Rauer, H., Rouan, D., Schneider, J., and Wuchterl, G.

Abstract

The transiting planet CoRoT-1b is thought to belong to the pM-class of planets, in which the thermal emission dominates in the optical wavelengths. We present a detection of its secondary eclipse in the CoRoT white channel data, whose response function goes from ~400 to ~1000 nm. We used two different filtering approaches, and several methods to evaluate the significance of a detection of the secondary eclipse. We detect a secondary eclipse centered within 20 min at the expected times for a circular orbit, with a depth of $0.016 \pm 0.006$%. The center of the eclipse is translated in a 1-σupper limit to the planet's eccentricity of $e\cos\omega< 0.014$. Under the assumption of a zero Bond Albedo and blackbody emission from the planet, it corresponds to a $T_{\rm CoRoT} = 2330^{+120}_{-140}$K. We provide the equilibrium temperatures of the planet as a function of the amount of reflected light. If the planet is in thermal equilibrium with the incident flux from the star, our results imply an inefficient transport mechanism of the flux from the day to the night sides.

Published
2009
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14. Noise properties of the CoRoT data*

Author

Aigrain, S., Pont, F., Fressin, F., Alapini, A., Alonso, R., Auvergne, M., Barbieri, M., Barge, P., Bordé, P., Bouchy, F., Deeg, H., De la Reza, R., Deleuil, M., Dvorak, R., Erikson, A., Fridlund, M., Gondoin, P., Guterman, P., Jorda, L., Lammer, H., Léger, A., Llebaria, A., Magain, P., Mazeh, T., Moutou, C., Ollivier, M., Pätzold, M., Queloz, D., Rauer, H., Rouan, D., Schneider, J., Wuchter, G., Zucker, S., Aigrain, S., Pont, F., Fressin, F., Alapini, A., Alonso, R., Auvergne, M., Barbieri, M., Barge, P., Bordé, P., Bouchy, F., Deeg, H., De la Reza, R., Deleuil, M., Dvorak, R., Erikson, A., Fridlund, M., Gondoin, P., Guterman, P., Jorda, L., Lammer, H., Léger, A., Llebaria, A., Magain, P., Mazeh, T., Moutou, C., Ollivier, M., Pätzold, M., Queloz, D., Rauer, H., Rouan, D., Schneider, J., Wuchter, G., and Zucker, S.

Abstract

In this short paper, we study the photometric precision of stellar light curves obtained by the CoRoT satellite in its planet-finding channel, with a particular emphasis on the time scales characteristic of planetary transits. Together with other articles in the same issue of this journal, it forms an attempt to provide the building blocks for a statistical interpretation of the CoRoT planet and eclipsing binary catch to date. After pre-processing the light curves so as to minimise long-term variations and outliers, we measure the scatter of the light curves in the first three CoRoT runs lasting more than 1 month, using an iterative non-linear filter to isolate signal on the time scales of interest. The behaviour of the noise on 2 h time scales is described well by a power-law with index 0.25 in R-magnitude, ranging from 0.1 mmag at $R=11.5$to 1 mmag at $R=16$, which is close to the pre-launch specification, though still a factor 2-3 above the photon noise due to residual jitter noise and hot pixel events. There is evidence of slight degradation in the performance over time. We find clear evidence of enhanced variability on hour time scales (at the level of 0.5 mmag) in stars identified as likely giants from their Rmagnitude and $B-V$colour, which represent approximately 60 and 20% of the observed population in the directions of Aquila and Monoceros, respectively. On the other hand, median correlated noise levels over 2 h for dwarf stars are extremely low, reaching 0.05 mmag at the bright end.

Published
2009
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15. Planetary transit candidates in CoRoT-LRc01 field *

Author

Cabrera, J., Fridlund, M., Ollivier, M., Gandolfi, D., Csizmadia, Sz., Alonso, R., Aigrain, S., Alapini, A., Almenara, J.-M., Barge, P., Bonomo, A. S., Bordé, P., Bouchy, F., Bruntt, H., Carone, L., Carpano, S., Deeg, H. J., De la Reza, R., Deleuil, M., Dvorak, R., Erikson, A., Gillon, M., Gondoin, P., Guenther, E. W., Guillot, T., Hartmann, M., Hatzes, A., Hebrard, G., Jorda, L., Lammer, H., Léger, A., Llebaria, A., Lovis, C., Magain, P., Mayor, M., Mazeh, T., Moutou, C., Ofir, A., Pätzold, M., Pepe, F., Pont, F., Queloz, D., Rabus, M., Rauer, H., Régulo, C., Renner, S., Rouan, D., Samuel, B., Santerne, A., Schneider, J., Shporer, A., Stecklum, B., Tingley, B., Udry, S., Wuchterl, G., Cabrera, J., Fridlund, M., Ollivier, M., Gandolfi, D., Csizmadia, Sz., Alonso, R., Aigrain, S., Alapini, A., Almenara, J.-M., Barge, P., Bonomo, A. S., Bordé, P., Bouchy, F., Bruntt, H., Carone, L., Carpano, S., Deeg, H. J., De la Reza, R., Deleuil, M., Dvorak, R., Erikson, A., Gillon, M., Gondoin, P., Guenther, E. W., Guillot, T., Hartmann, M., Hatzes, A., Hebrard, G., Jorda, L., Lammer, H., Léger, A., Llebaria, A., Lovis, C., Magain, P., Mayor, M., Mazeh, T., Moutou, C., Ofir, A., Pätzold, M., Pepe, F., Pont, F., Queloz, D., Rabus, M., Rauer, H., Régulo, C., Renner, S., Rouan, D., Samuel, B., Santerne, A., Schneider, J., Shporer, A., Stecklum, B., Tingley, B., Udry, S., and Wuchterl, G.

Abstract

Aims. We present here the list of planetary transit candidates detected in the first long run observed by CoRoT: LRc01, towards the galactic center in the direction of Aquila, which lasted from May to October 2007.

Published
2009
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16. Planetary transit candidates in Corot-IRa01 field *

Author

Carpano, S., Cabrera, J., Alonso, R., Barge, P., Aigrain, S., Almenara, J.-M., Bordé, P., Bouchy, F., Carone, L., Deeg, H. J., De la Reza, R., Deleuil, M., Dvorak, R., Erikson, A., Fressin, F., Fridlund, M., Gondoin, P., Guillot, T., Hatzes, A., Jorda, L., Lammer, H., Léger, A., Llebaria, A., Magain, P., Moutou, C., Ofir, A., Ollivier, M., Janot-Pacheco, E., Pätzold, M., Pont, F., Queloz, D., Rauer, H., Régulo, C., Renner, S., Rouan, D., Samuel, B., Schneider, J., Wuchterl, G., Carpano, S., Cabrera, J., Alonso, R., Barge, P., Aigrain, S., Almenara, J.-M., Bordé, P., Bouchy, F., Carone, L., Deeg, H. J., De la Reza, R., Deleuil, M., Dvorak, R., Erikson, A., Fressin, F., Fridlund, M., Gondoin, P., Guillot, T., Hatzes, A., Jorda, L., Lammer, H., Léger, A., Llebaria, A., Magain, P., Moutou, C., Ofir, A., Ollivier, M., Janot-Pacheco, E., Pätzold, M., Pont, F., Queloz, D., Rauer, H., Régulo, C., Renner, S., Rouan, D., Samuel, B., Schneider, J., and Wuchterl, G.

Abstract

Context. CoRoT is a pioneering space mission devoted to the analysis of stellar variability and the photometric detection of extrasolar planets.

Published
2009
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17. Transiting exoplanets from the CoRoT space mission*

Author

Rauer, H., Queloz, D., Csizmadia, Sz., Deleuil, M., Alonso, R., Aigrain, S., Almenara, J. M., Auvergne, M., Baglin, A., Barge, P., Bordé, P., Bouchy, F., Bruntt, H., Cabrera, J., Carone, L., Carpano, S., De la Reza, R., Deeg, H. J., Dvorak, R., Erikson, A., Fridlund, M., Gandolfi, D., Gillon, M., Guillot, T., Guenther, E., Hatzes, A., Hébrard, G., Kabath, P., Jorda, L., Lammer, H., Léger, A., Llebaria, A., Magain, P., Mazeh, T., Moutou, C., Ollivier, M., Pätzold, M., Pont, F., Rabus, M., Renner, S., Rouan, D., Shporer, A., Samuel, B., Schneider, J., Triaud, A. H. M. J., Wuchterl, G., Rauer, H., Queloz, D., Csizmadia, Sz., Deleuil, M., Alonso, R., Aigrain, S., Almenara, J. M., Auvergne, M., Baglin, A., Barge, P., Bordé, P., Bouchy, F., Bruntt, H., Cabrera, J., Carone, L., Carpano, S., De la Reza, R., Deeg, H. J., Dvorak, R., Erikson, A., Fridlund, M., Gandolfi, D., Gillon, M., Guillot, T., Guenther, E., Hatzes, A., Hébrard, G., Kabath, P., Jorda, L., Lammer, H., Léger, A., Llebaria, A., Magain, P., Mazeh, T., Moutou, C., Ollivier, M., Pätzold, M., Pont, F., Rabus, M., Renner, S., Rouan, D., Shporer, A., Samuel, B., Schneider, J., Triaud, A. H. M. J., and Wuchterl, G.

Abstract

Aims. The CoRoT space mission continues to photometrically monitor about 12 000 stars in its field-of-view for a series of target fields to search for transiting extrasolar planets ever since 2007. Deep transit signals can be detected quickly in the “alarm-mode” in parallel to the ongoing target field monitoring. CoRoT's first planets have been detected in this mode.

Published
2009
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18. Planetary transit candidates in the CoRoT initial run: resolving their nature ***

Author

Moutou, C., Pont, F., Bouchy, F., Deleuil, M., Almenara, J. M., Alonso, R., Barbieri, M., Bruntt, H., Deeg, H. J., Fridlund, M., Gandolfi, D., Gillon, M., Guenther, E., Hatzes, A., Hébrard, G., Loeillet, B., Mayor, M., Mazeh, T., Queloz, D., Rabus, M., Rouan, D., Shporer, A., Udry, S., Aigrain, S., Auvergne, M., Baglin, A., Barge, P., Benz, W., Bordé, P., Carpano, S., De la Reza, R., Dvorak, R., Erikson, A., Gondoin, P., Guillot, T., Jorda, L., Kabath, P., Lammer, H., Léger, A., Llebaria, A., Lovis, C., Magain, P., Ollivier, M., Pätzold, M., Pepe, F., Rauer, H., Schneider, J., Wuchterl, G., Moutou, C., Pont, F., Bouchy, F., Deleuil, M., Almenara, J. M., Alonso, R., Barbieri, M., Bruntt, H., Deeg, H. J., Fridlund, M., Gandolfi, D., Gillon, M., Guenther, E., Hatzes, A., Hébrard, G., Loeillet, B., Mayor, M., Mazeh, T., Queloz, D., Rabus, M., Rouan, D., Shporer, A., Udry, S., Aigrain, S., Auvergne, M., Baglin, A., Barge, P., Benz, W., Bordé, P., Carpano, S., De la Reza, R., Dvorak, R., Erikson, A., Gondoin, P., Guillot, T., Jorda, L., Kabath, P., Lammer, H., Léger, A., Llebaria, A., Lovis, C., Magain, P., Ollivier, M., Pätzold, M., Pepe, F., Rauer, H., Schneider, J., and Wuchterl, G.

Abstract

With the release of CoRoT lightcurves of the Initial Run IRa01, 50 transiting planetary candidates have been published in a companion paper. About twenty of them were identified as binary stars from the CoRoT lightcurve itself. Complementary observations were conducted for 29 candidates, including ground-based photometry and radial-velocity measurements. Two giant planets were identified and fully characterized. Nineteen binaries are recognized, from which 10 are background eclipsing binaries in the CoRoT mask or triple systems, diluted by the main CoRoT target. Eight cases remain of unclear origin, one of them still being a planetary candidate. Comparison with simulations shows that the actual threshold of confirmed planet detection in this field does not yet fulfill the expectations, and a number of reasons are invoked, like the ranking process based on lightcurve analyses, and the strategy and limits of follow-up observations for targets fainter than magnitude 15.

Published
2009
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19. The CoRoT satellite in flight: description and performance*

Author

Auvergne, M., Bodin, P., Boisnard, L., Buey, J.-T., Chaintreuil, S., Epstein, G., Jouret, M., Lam-Trong, T., Levacher, P., Magnan, A., Perez, R., Plasson, P., Plesseria, J., Peter, G., Steller, M., Tiphène, D., Baglin, A., Agogué, P., Appourchaux, T., Barbet, D., Beaufort, T., Bellenger, R., Berlin, R., Bernardi, P., Blouin, D., Boumier, P., Bonneau, F., Briet, R., Butler, B., Cautain, R., Chiavassa, F., Costes, V., Cuvilho, J., Cunha-Parro, V., De Oliveira Fialho, F., Decaudin, M., Defise, J.-M., Djalal, S., Docclo, A., Drummond, R., Dupuis, O., Exil, G., Fauré, C., Gaboriaud, A., Gamet, P., Gavalda, P., Grolleau, E., Gueguen, L., Guivarc'h, V., Guterman, P., Hasiba, J., Huntzinger, G., Hustaix, H., Imbert, C., Jeanville, G., Johlander, B., Jorda, L., Journoud, P., Karioty, F., Kerjean, L., Lafond, L., Lapeyrere, V., Landiech, P., Larqué, T., Laudet, P., Le Merrer, J., Leporati, L., Leruyet, B., Levieuge, B., Llebaria, A., Martin, L., Mazy, E., Mesnager, J.-M., Michel, J.-P., Moalic, J.-P., Monjoin, W., Naudet, D., Neukirchner, S., Nguyen-Kim, K., Ollivier, M., Orcesi, J.-L., Ottacher, H., Oulali, A., Parisot, J., Perruchot, S., Piacentino, A., Pinheiro da Silva, L., Platzer, J., Pontet, B., Pradines, A., Quentin, C., Rohbeck, U., Rolland, G., Rollenhagen, F., Romagnan, R., Russ, N., Samadi, R., Schmidt, R., Schwartz, N., Sebbag, I., Smit, H., Sunter, W., Tello, M., Toulouse, P., Ulmer, B., Vandermarcq, O., Vergnault, E., Wallner, R., Waultier, G., Zanatta, P., Auvergne, M., Bodin, P., Boisnard, L., Buey, J.-T., Chaintreuil, S., Epstein, G., Jouret, M., Lam-Trong, T., Levacher, P., Magnan, A., Perez, R., Plasson, P., Plesseria, J., Peter, G., Steller, M., Tiphène, D., Baglin, A., Agogué, P., Appourchaux, T., Barbet, D., Beaufort, T., Bellenger, R., Berlin, R., Bernardi, P., Blouin, D., Boumier, P., Bonneau, F., Briet, R., Butler, B., Cautain, R., Chiavassa, F., Costes, V., Cuvilho, J., Cunha-Parro, V., De Oliveira Fialho, F., Decaudin, M., Defise, J.-M., Djalal, S., Docclo, A., Drummond, R., Dupuis, O., Exil, G., Fauré, C., Gaboriaud, A., Gamet, P., Gavalda, P., Grolleau, E., Gueguen, L., Guivarc'h, V., Guterman, P., Hasiba, J., Huntzinger, G., Hustaix, H., Imbert, C., Jeanville, G., Johlander, B., Jorda, L., Journoud, P., Karioty, F., Kerjean, L., Lafond, L., Lapeyrere, V., Landiech, P., Larqué, T., Laudet, P., Le Merrer, J., Leporati, L., Leruyet, B., Levieuge, B., Llebaria, A., Martin, L., Mazy, E., Mesnager, J.-M., Michel, J.-P., Moalic, J.-P., Monjoin, W., Naudet, D., Neukirchner, S., Nguyen-Kim, K., Ollivier, M., Orcesi, J.-L., Ottacher, H., Oulali, A., Parisot, J., Perruchot, S., Piacentino, A., Pinheiro da Silva, L., Platzer, J., Pontet, B., Pradines, A., Quentin, C., Rohbeck, U., Rolland, G., Rollenhagen, F., Romagnan, R., Russ, N., Samadi, R., Schmidt, R., Schwartz, N., Sebbag, I., Smit, H., Sunter, W., Tello, M., Toulouse, P., Ulmer, B., Vandermarcq, O., Vergnault, E., Wallner, R., Waultier, G., and Zanatta, P.

Abstract

Context. CoRoT is a space telescope dedicated to stellar seismology and the search for extrasolar planets. The mission is led by the CNES in association with French laboratories and has a large international participation. The European Space Agency (ESA), Austria, Belgium, and Germany contribute to the payload, and Spain and Brazil contribute to the ground segment. Development of the spacecraft, which is based on a PROTEUS low earth orbit (LEO) recurrent platform, commenced in October 2000, and the satellite was launched on December 27, 2006.

Published
2009
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20. Rate and nature of false positives in the CoRoT exoplanet search*

Author

Almenara, J. M., Deeg, H. J., Aigrain, S., Alonso, R., Auvergne, M., Baglin, A., Barbieri, M., Barge, P., Bordé, P., Bouchy, F., Bruntt, H., Cabrera, J., Carone, L., Carpano, S., Catala, C., Csizmadia, Sz., De la Reza, R., Deleuil, M., Dvorak, R., Erikson, A., Fridlund, M., Gandolfi, D., Gillon, M., Gondoin, P., Guenther, E., Guillot, T., Hatzes, A., Hébrard, G., Jorda, L., Lammer, H., Léger, A., Llebaria, A., Loeillet, B., Magain, P., Mayor, M., Mazeh, T., Moutou, C., Ollivier, M., Pätzold, M., Pont, F., Queloz, D., Rauer, H., Régulo, C., Renner, S., Rouan, D., Samuel, B., Schneider, J., Shporer, A., Wuchterl, G., Zucker, S., Almenara, J. M., Deeg, H. J., Aigrain, S., Alonso, R., Auvergne, M., Baglin, A., Barbieri, M., Barge, P., Bordé, P., Bouchy, F., Bruntt, H., Cabrera, J., Carone, L., Carpano, S., Catala, C., Csizmadia, Sz., De la Reza, R., Deleuil, M., Dvorak, R., Erikson, A., Fridlund, M., Gandolfi, D., Gillon, M., Gondoin, P., Guenther, E., Guillot, T., Hatzes, A., Hébrard, G., Jorda, L., Lammer, H., Léger, A., Llebaria, A., Loeillet, B., Magain, P., Mayor, M., Mazeh, T., Moutou, C., Ollivier, M., Pätzold, M., Pont, F., Queloz, D., Rauer, H., Régulo, C., Renner, S., Rouan, D., Samuel, B., Schneider, J., Shporer, A., Wuchterl, G., and Zucker, S.

Abstract

Context. The CoRoT satellite searches for planets by applying the transit method, monitoring up to 12 000 stars in the galactic plane for 150 days in each observing run. This search is contaminated by a large fraction of false positives, caused by different eclipsing binary configurations that might be confused with a transiting planet.

Published
2009
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21. Transiting exoplanets from the CoRoTspace mission ***

Author

Deleuil, M., Deeg, H. J., Alonso, R., Bouchy, F., Rouan, D., Auvergne, M., Baglin, A., Aigrain, S., Almenara, J. M., Barbieri, M., Barge, P., Bruntt, H., Bordé, P., Collier Cameron, A., Csizmadia, Sz., De la Reza, R., Dvorak, R., Erikson, A., Fridlund, M., Gandolfi, D., Gillon, M., Guenther, E., Guillot, T., Hatzes, A., Hébrard, G., Jorda, L., Lammer, H., Léger, A., Llebaria, A., Loeillet, B., Mayor, M., Mazeh, T., Moutou, C., Ollivier, M., Pätzold, M., Pont, F., Queloz, D., Rauer, H., Schneider, J., Shporer, A., Wuchterl, G., Zucker, S., Deleuil, M., Deeg, H. J., Alonso, R., Bouchy, F., Rouan, D., Auvergne, M., Baglin, A., Aigrain, S., Almenara, J. M., Barbieri, M., Barge, P., Bruntt, H., Bordé, P., Collier Cameron, A., Csizmadia, Sz., De la Reza, R., Dvorak, R., Erikson, A., Fridlund, M., Gandolfi, D., Gillon, M., Guenther, E., Guillot, T., Hatzes, A., Hébrard, G., Jorda, L., Lammer, H., Léger, A., Llebaria, A., Loeillet, B., Mayor, M., Mazeh, T., Moutou, C., Ollivier, M., Pätzold, M., Pont, F., Queloz, D., Rauer, H., Schneider, J., Shporer, A., Wuchterl, G., and Zucker, S.

Abstract

Context. The CoRoTspace mission routinely provides high-precision photometric measurements of thousands of stars that have been continuously observed for months.

Published
2008
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22. Transiting exoplanets from the CoRoT space mission***

Author

Moutou, C., Bruntt, H., Guillot, T., Shporer, A., Guenther, E., Aigrain, S., Almenara, J. M., Alonso, R., Auvergne, M., Baglin, A., Barbieri, M., Barge, P., Benz, W., Bordé, P., Bouchy, F., Deeg, H. J., De la Reza, R., Deleuil, M., Dvorak, R., Erikson, A., Fridlund, M., Gillon, M., Gondoin, P., Hatzes, A., Hébrard, G., Jorda, L., Kabath, P., Lammer, H., Léger, A., Llebaria, A., Loeillet, B., Magain, P., Mayor, M., Mazeh, T., Ollivier, M., Pätzold, M., Pepe, F., Pont, F., Queloz, D., Rabus, M., Rauer, H., Rouan, D., Schneider, J., Udry, S., Wuchterl, G., Moutou, C., Bruntt, H., Guillot, T., Shporer, A., Guenther, E., Aigrain, S., Almenara, J. M., Alonso, R., Auvergne, M., Baglin, A., Barbieri, M., Barge, P., Benz, W., Bordé, P., Bouchy, F., Deeg, H. J., De la Reza, R., Deleuil, M., Dvorak, R., Erikson, A., Fridlund, M., Gillon, M., Gondoin, P., Hatzes, A., Hébrard, G., Jorda, L., Kabath, P., Lammer, H., Léger, A., Llebaria, A., Loeillet, B., Magain, P., Mayor, M., Mazeh, T., Ollivier, M., Pätzold, M., Pepe, F., Pont, F., Queloz, D., Rabus, M., Rauer, H., Rouan, D., Schneider, J., Udry, S., and Wuchterl, G.

Abstract

Aims. The CoRoT satellite has announced its fourth transiting planet (Aigrain et al. 2008, A&A, 488, L43) with space photometry. We describe and analyse complementary observations of this system performed to establish the planetary nature of the transiting body and to estimate the fundamental parameters of the planet and its parent star.

Published
2008
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23. Transiting exoplanets from the CoRoT space mission***

Author

Aigrain, S., Collier Cameron, A., Ollivier, M., Pont, F., Jorda, L., Almenara, J. M., Alonso, R., Barge, P., Bordé, P., Bouchy, F., Deeg, H., De la Reza, R., Deleuil, M., Dvorak, R., Erikson, A., Fridlund, M., Gondoin, P., Gillon, M., Guillot, T., Hatzes, A., Lammer, H., Lanza, A. F., Léger, A., Llebaria, A., Magain, P., Mazeh, T., Moutou, C., Paetzold, M., Pinte, C., Queloz, D., Rauer, H., Rouan, D., Schneider, J., Wuchter, G., Zucker, S., Aigrain, S., Collier Cameron, A., Ollivier, M., Pont, F., Jorda, L., Almenara, J. M., Alonso, R., Barge, P., Bordé, P., Bouchy, F., Deeg, H., De la Reza, R., Deleuil, M., Dvorak, R., Erikson, A., Fridlund, M., Gondoin, P., Gillon, M., Guillot, T., Hatzes, A., Lammer, H., Lanza, A. F., Léger, A., Llebaria, A., Magain, P., Mazeh, T., Moutou, C., Paetzold, M., Pinte, C., Queloz, D., Rauer, H., Rouan, D., Schneider, J., Wuchter, G., and Zucker, S.

Abstract

CoRoT, the first space-based transit search, provides ultra-high-precision light curves with continuous time-sampling over periods of up to 5 months. This allows the detection of transiting planets with relatively long periods, and the simultaneous study of the host star's photometric variability. In this Letter, we report the discovery of the transiting giant planet CoRoT-Exo-4b and use the CoRoT light curve to perform a detailed analysis of the transit and determine the stellar rotation period. The CoRoT light curve was pre-processed to remove outliers and correct for orbital residuals and artefacts due to hot pixels on the detector. After removing stellar variability about each transit, the transit light curve was analysed to determine the transit parameters. A discrete autocorrelation function method was used to derive the rotation period of the star from the out-of-transit light curve. We determine the periods of the planetary orbit and star's rotation of 9.20205 ±0.00037 and 8.87 ±1.12 days respectively, which is consistent with this being a synchronised system. We also derive the inclination, $i = 90.00_{\rm -0.085}^{+0.000}$in degrees, the ratio of the orbital distance to the stellar radius, $a/R_{\rm s} = 17.36_{-0.25}^{+0.05}$, and the planet-to-star radius ratio $R_{\rm p}/R_{\rm s}=0.1047_{-0.0022}^{+0.0041}$. We discuss briefly the coincidence between the orbital period of the planet and the stellar rotation period and its possible implications for the system's migration and star-planet interaction history.

Published
2008
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24. Transiting exoplanets from the CoRoT space mission*

Author

Bouchy, F., Queloz, D., Deleuil, M., Loeillet, B., Hatzes, A. P., Aigrain, S., Alonso, R., Auvergne, M., Baglin, A., Barge, P., Benz, W., Bordé, P., Deeg, H. J., De la Reza, R., Dvorak, R., Erikson, A., Fridlund, M., Gondoin, P., Guillot, T., Hébrard, G., Jorda, L., Lammer, H., Léger, A., Llebaria, A., Magain, P., Mayor, M., Moutou, C., Ollivier, M., Pätzold, M., Pepe, F., Pont, F., Rauer, H., Rouan, D., Schneider, J., Triaud, A. H. M. J., Udry, S., Wuchterl, G., Bouchy, F., Queloz, D., Deleuil, M., Loeillet, B., Hatzes, A. P., Aigrain, S., Alonso, R., Auvergne, M., Baglin, A., Barge, P., Benz, W., Bordé, P., Deeg, H. J., De la Reza, R., Dvorak, R., Erikson, A., Fridlund, M., Gondoin, P., Guillot, T., Hébrard, G., Jorda, L., Lammer, H., Léger, A., Llebaria, A., Magain, P., Mayor, M., Moutou, C., Ollivier, M., Pätzold, M., Pepe, F., Pont, F., Rauer, H., Rouan, D., Schneider, J., Triaud, A. H. M. J., Udry, S., and Wuchterl, G.

Abstract

We report on the spectroscopic transit of the massive hot-Jupiter CoRoT-Exo-2b observed with the high-precision spectrographs SOPHIE and HARPS. By modeling the radial velocity anomaly occurring during the transit due to the Rossiter-McLaughlin (RM) effect, we determine the sky-projected angle between the stellar spin and the planetary orbital axis to be close to zero λ= 7.2 ±4.5 deg, and we secure the planetary nature of CoRoT-Exo-2b. We discuss the influence of the stellar activity on the RM modeling. Spectral analysis of the parent star from HARPS spectra are presented.

Published
2008
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25. Three-dimensional reconstruction of the streamer belt and other large-scale structures of the solar corona

Author

Saez, F., Llebaria, A., Lamy, P., Vibert, D., Saez, F., Llebaria, A., Lamy, P., and Vibert, D.

Abstract

Context.The high spatial resolution, white-light images obtained by the LASCO coronagraphs provide a detailed record of the solar corona over almost a full solar cycle. Their analysis and interpretation poses a formidable challenge for ultimately retrieving the 3-dimensional distribution of electrons in the corona.

Published
2007
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26. On the 3-dimensional structure of the streamer belt of the solar corona

Author

Saez, F., Zhukov, A. N., Lamy, P., Llebaria, A., Saez, F., Zhukov, A. N., Lamy, P., and Llebaria, A.

Abstract

We investigate the three-dimensional structure of the streamer belt of the solar corona using a model that allows us to simulate its quasi-stationary configuration. Starting from the National Solar Observatory photospheric magnetograms, the position of the neutral line at the source surface ($2.5 ~R_\odot$) is determined using the potential field source surface model. A plasma sheet is centered around the current sheet represented as the radial extension of the neutral line. Comparing the synoptic maps of the streamer belt obtained with the SOHO/LASCO-C2 coronagraph and the simulated synoptic maps constructed from our model of the warped plasma sheet, we confirm earlier findings by Wang et al. (1997, ApJ, 485, 875; Wang et al. 2000, Geophys. Res. Lett., 27, 149) that the streamers are associated with folds in the plasma sheet. Although the large-scale structure of the streamer belt is described reasonably well, some features, however, cannot be explained in this framework. We propose that two types of large-scale structures take part in the formation of these additional features. The first one is an additional fold of the neutral line, which does not appear in the modeled source surface neutral line, but is well visible in photospheric magnetograms. The second one is a plasma sheet with a ramification in the form of a secondary short plasma sheet. We show that these structures better describe the observed configurations of the streamer belt. The secondary plasma sheet can be formed between two secondary current sheets connected to the main current sheet. Our results suggest that the potential field source surface model is not fully adequate for the description of the fine structure of the streamer belt, even during the time of low solar activity.

Published
2005
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27. The CoRoT-7?planetary system: two orbiting super-Earths

Author

Queloz, D., Bouchy, F., Moutou, C., Hatzes, A., H?brard, G., Alonso, R., Auvergne, M., Baglin, A., Barbieri, M., Barge, P., Benz, W., Bord?, P., Deeg, H., Deleuil, M., Dvorak, R., Erikson, A., Ferraz Mello, S., Fridlund, M., Gandolfi, D., Gillon, M., Guenther, E., Guillot, T., Jorda, L., Hartmann, M., Lammer, H., L?ger, A., Llebaria, A., Lovis, C., Magain, P., Mayor, M., Mazeh, T., Ollivier, M., P?tzold, M., Pepe, F., Rauer, H., Rouan, D., Schneider, J., Segransan, D., Udry, S., and Wuchterl, G.

Abstract

We report on an intensive observational campaign carried out with HARPS at the 3.6?m telescope at La Silla on the star CoRoT-7. Additional simultaneous photometric measurements carried out with the Euler Swiss telescope have demonstrated that the observed radial velocity variations are dominated by rotational modulation from cool spots on the stellar surface. Several approaches were used to extract the radial velocity signal of the planet(s) from the stellar activity signal. First, a simple pre-whitening procedure was employed to find and subsequently remove periodic signals from the complex frequency structure of the radial velocity data. The dominant frequency in the power spectrum was found at 23??days, which corresponds to the rotation period of CoRoT-7. The 0.8535?day period of CoRoT-7b?planetary candidate was detected with an amplitude of 3.3?m?s-1. Most other frequencies, some with amplitudes larger than the CoRoT-7b signal, are most likely associated with activity. A second approach used harmonic decomposition of the rotational period and up to the first three harmonics to filter out the activity signal from radial velocity variations caused by orbiting planets. After correcting the radial velocity data for activity, two periodic signals are detected: the CoRoT-7b? transit period and a second one with a period of 3.69?days and an amplitude of 4?m?s-1. This second signal was also found in the pre-whitening analysis. We attribute the second signal to a second, more remote planet CoRoT-7c?. The orbital solution of both planets is compatible with circular orbits. The mass of CoRoT-7b?is 4.8?0.8 (M) and that of CoRoT-7c?is 8.4?0.9 (M), assuming both planets are on coplanar orbits. We also investigated the false positive scenario of a blend by a faint stellar binary, and this may be rejected by the stability of the bisector on a nightly scale. According to their masses both planets belong to the super-Earth planet category. The average density of CoRoT-7b?is ?=5.6?1.3gcm-3, similar to the Earth. The CoRoT-7?planetary system provides us with the first insight into the physical nature of short period super-Earth planets recently detected by radial velocity surveys. These planets may be denser than Neptune and therefore likely made of rocks like the Earth, or a mix of water ice and rocks.

Published
2009

28. CoRoT LRa02_E2_0121: Neptune-size planet candidate turns into a hierarchical triple system with a giant primary⋆

Author

Tal-Or, L., Santerne, A., Mazeh, T., Bouchy, F., Moutou, C., Alonso, R., Gandolfi, D., Aigrain, S., Auvergne, M., Barge, P., Bonomo, A. S., Bordé, P., Deeg, H., Ferraz-Mello, S., Deleuil, M., Dvorak, R., Erikson, A., Fridlund, M., Gillon, M., Guenther, E. W., Guillot, T., Hatzes, A., Jorda, L., Lammer, H., Léger, A., Llebaria, A., Ollivier, M., Pätzold, M., Queloz, D., Rauer, H., Rouan, D., Tsodikovich, Y., and Wuchterl, G.

Abstract

This paper presents the case of CoRoT LRa02_E2_0121, which was initially classified as a Neptune-size transiting-planet candidate on a relatively wide orbit of 36.3 days. Follow-up observations were performed with UVES, Sandiford, SOPHIE, and HARPS. These observations revealed a faint companion in the spectra. To find the true nature of the system we derived the radial velocities of the faint companion using TODMOR – a two-dimensional correlation technique, applied to the SOPHIE spectra. Modeling the lightcurve with EBAS we discovered a secondary eclipse with a depth of  ~0.07%, indicating a diluted eclipsing binary. Combined MCMC modeling of the lightcurve and the radial velocities suggested that CoRoT LRa02_E2_0121 is a hierarchical triple system with an evolved G-type primary and an A-type:F-type grazing eclipsing binary. Such triple systems are difficult to discover.

Published
2011
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29. Transiting exoplanets from the CoRoT space mission⋆⋆⋆

Author

Hébrard, G., Evans, T. M., Alonso, R., Fridlund, M., Ofir, A., Aigrain, S., Guillot, T., Almenara, J. M., Auvergne, M., Baglin, A., Barge, P., Bonomo, A. S., Bordé, P., Bouchy, F., Cabrera, J., Carone, L., Carpano, S., Cavarroc, C., Csizmadia, Sz., Deeg, H. J., Deleuil, M., Díaz, R. F., Dvorak, R., Erikson, A., Ferraz-Mello, S., Gandolfi, D., Gibson, N., Gillon, M., Guenther, E., Hatzes, A., Havel, M., Jorda, L., Lammer, H., Léger, A., Llebaria, A., Mazeh, T., Moutou, C., Ollivier, M., Parviainen, H., Pätzold, M., Queloz, D., Rauer, H., Rouan, D., Santerne, A., Schneider, J., Tingley, B., and Wuchterl, G.

Abstract

We report the detection of CoRoT-18b, a massive hot Jupiter transiting in front of its host star with a period of 1.9000693 ± 0.0000028 days. This planet was discovered thanks to photometric data secured with the CoRoT satellite combined with spectroscopic and photometric ground-based follow-up observations. The planet has a mass Mp= 3.47 ± 0.38 MJup, a radius Rp= 1.31 ± 0.18 RJup, and a density ρp= 2.2 ± 0.8 g cm-3. It orbits a G9V star with a mass M⋆= 0.95 ± 0.15   M⊙, a radius R⋆= 1.00 ± 0.13   R⊙, and arotation period Prot= 5.4 ± 0.4 days. The age of the system remains uncertain, with stellar evolution models pointing either to a few tens Ma or several Ga, while gyrochronology and lithium abundance point towards ages of a few hundred Ma. This mismatch potentially points to a problem in our understanding of the evolution of young stars, with possibly significant implications for stellar physics and the interpretation of inferred sizes of exoplanets around young stars. We detected the Rossiter-McLaughlin anomaly in the CoRoT-18 system thanks to the spectroscopic observation of a transit. We measured the obliquity ψ= 20° ± 20° (sky-projected value λ= −10° ± 20°), indicating that the planet orbits in the same way as the star is rotating and that this prograde orbit is nearly aligned with the stellar equator.

Published
2011
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30. Transiting exoplanets from the CoRoT space mission⋆

Author

Csizmadia, Sz., Moutou, C., Deleuil, M., Cabrera, J., Fridlund, M., Gandolfi, D., Aigrain, S., Alonso, R., Almenara, J.-M., Auvergne, M., Baglin, A., Barge, P., Bonomo, A. S., Bordé, P., Bouchy, F., Bruntt, H., Carone, L., Carpano, S., Cavarroc, C., Cochran, W., Deeg, H. J., Díaz, R. F., Dvorak, R., Endl, M., Erikson, A., Ferraz-Mello, S., Fruth, Th., Gazzano, J.-C., Gillon, M., Guenther, E. W., Guillot, T., Hatzes, A., Havel, M., Hébrard, G., Jehin, E., Jorda, L., Léger, A., Llebaria, A., Lammer, H., Lovis, C., MacQueen, P. J., Mazeh, T., Ollivier, M., Pätzold, M., Queloz, D., Rauer, H., Rouan, D., Santerne, A., Schneider, J., Tingley, B., Titz-Weider, R., and Wuchterl, G.

Abstract

We report on the discovery of a hot Jupiter-type exoplanet, CoRoT-17b, detected by the CoRoT satellite. It has a mass of 2.43  ±  0.30 MJupand a radius of 1.02  ±  0.07 RJup, while its mean density is 2.82  ±  0.38 g/cm3. CoRoT-17b is in a circular orbit with a period of 3.7681  ±  0.0003 days. The host star is an old (10.7  ±  1.0 Gyr) main-sequence star, which makes it an intriguing object for planetary evolution studies. The planet’s internal composition is not well constrained and can range from pure H/He to one that can contain  ~380 earth masses of heavier elements.

Published
2011
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31. Transiting exoplanets from the CoRoT space mission⋆

Author

Tingley, B., Endl, M., Gazzano, J.-C., Alonso, R., Mazeh, T., Jorda, L., Aigrain, S., Almenara, J.-M., Auvergne, M., Baglin, A., Barge, P., Bonomo, A. S., Bordé, P., Bouchy, F., Bruntt, H., Cabrera, J., Carpano, S., Carone, L., Cochran, W. D., Csizmadia, Sz., Deleuil, M., Deeg, H. J., Dvorak, R., Erikson, A., Ferraz-Mello, S., Fridlund, M., Gandolfi, D., Gillon, M., Guenther, E. W., Guillot, T., Hatzes, A., Hébrard, G., Léger, A., Llebaria, A., Lammer, H., Lovis, C., MacQueen, P. J., Moutou, C., Ollivier, M., Ofir, A., Pätzold, M., Pepe, F., Queloz, D., Rauer, H., Rouan, D., Samuel, B., Schneider, J., Shporer, A., and Wuchterl, G.

Abstract

In this paper, the CoRoT ExoplanetScience Team announces its 14th discovery. Herein, we discuss the observations and analyses that allowed us to derive the parameters of this system: a hot Jupiter with a mass of 7.6 ± 0.6 Jupiter masses orbiting a solar-type star (F9V) with a period of only 1.5 d, less than 5 stellar radii from its parent star. It is unusual for such a massive planet to have such a small orbit: only one other known higher mass exoplanet orbits with a shorter period.

Published
2011
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32. Transiting exoplanets from the CoRoT space mission⋆

Author

Bouchy, F., Deleuil, M., Guillot, T., Aigrain, S., Carone, L., Cochran, W. D., Almenara, J. M., Alonso, R., Auvergne, M., Baglin, A., Barge, P., Bonomo, A. S., Bordé, P., Csizmadia, Sz., De Bondt, K., Deeg, H. J., Díaz, R. F., Dvorak, R., Endl, M., Erikson, A., Ferraz-Mello, S., Fridlund, M., Gandolfi, D., Gazzano, J. C., Gibson, N., Gillon, M., Guenther, E., Hatzes, A., Havel, M., Hébrard, G., Jorda, L., Léger, A., Lovis, C., Llebaria, A., Lammer, H., MacQueen, P. J., Mazeh, T., Moutou, C., Ofir, A., Ollivier, M., Parviainen, H., Pätzold, M., Queloz, D., Rauer, H., Rouan, D., Santerne, A., Schneider, J., Tingley, B., and Wuchterl, G.

Abstract

We report the discovery by the CoRoTspace mission of a transiting brown dwarf orbiting a F7V star with an orbital period of 3.06 days. CoRoT-15b has a radius of 1.12\hbox{$^{+0.30}_{-0.15}$}RJupand a mass of 63.3 ± 4.1 MJup, and is thus the second transiting companion lying in the theoretical mass domain of brown dwarfs. CoRoT-15b is either very young or inflated compared to standard evolution models, a situation similar to that of M-dwarf stars orbiting close to solar-typestars. Spectroscopic constraints and an analysis of the lightcurve imply a spin period in the range 2.9–3.1 days for the central star, which is compatible with a double-synchronisation of the system.

Published
2011
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33. Transiting exoplanets from the CoRoT space mission

Author

Gandolfi, D., Hébrard, G., Alonso, R., Deleuil, M., Guenther, E. W., Fridlund, M., Endl, M., Eigmüller, P., Csizmadia, Sz., Havel, M., Aigrain, S., Auvergne, M., Baglin, A., Barge, P., Bonomo, A. S., Bordé, P., Bouchy, F., Bruntt, H., Cabrera, J., Carpano, S., Carone, L., Cochran, W. D., Deeg, H. J., Dvorak, R., Eislöffel, J., Erikson, A., Ferraz-Mello, S., Gazzano, J.-C., Gibson, N. B., Gillon, M., Gondoin, P., Guillot, T., Hartmann, M., Hatzes, A., Jorda, L., Kabath, P., Léger, A., Llebaria, A., Lammer, H., MacQueen, P. J., Mayor, M., Mazeh, T., Moutou, C., Ollivier, M., Pätzold, M., Pepe, F., Queloz, D., Rauer, H., Rouan, D., Samuel, B., Schneider, J., Stecklum, B., Tingley, B., Udry, S., and Wuchterl, G.

Abstract

The CoRoTexoplanet science team announces the discovery of CoRoT-11b, a fairly massive hot-Jupiter transiting a V= 12.9 mag F6 dwarf star (M∗= 1.27 ± 0.05 M⊙, R∗= 1.37 ± 0.03 R⊙, Teff= 6440 ± 120 K), with an orbital period of P= 2.994329 ± 0.000011 days and semi-major axis a= 0.0436 ± 0.005 AU. The detection of part of the radial velocity anomaly caused by the Rossiter-McLaughlin effect shows that the transit-like events detected by CoRoTare caused by a planet-sized transiting object in a prograde orbit. The relatively high projected rotational velocity of the star (vsini⋆= 40 ± 5 km s-1) places CoRoT-11 among the most rapidly rotating planet host stars discovered so far. With a planetary mass of Mp= 2.33 ± 0.34 MJupand radius Rp= 1.43 ± 0.03 RJup, the resulting mean density of CoRoT-11b (ρp= 0.99 ± 0.15 g/cm3) can be explained with a model for an inflated hydrogen-planet with a solar composition and a high level of energy dissipation in its interior.

Published
2010
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34. Transiting exoplanets from the CoRoT space mission⋆

Author

Cabrera, J., Bruntt, H., Ollivier, M., Díaz, R. F., Csizmadia, Sz., Aigrain, S., Alonso, R., Almenara, J.-M., Auvergne, M., Baglin, A., Barge, P., Bonomo, A. S., Bordé, P., Bouchy, F., Carone, L., Carpano, S., Deleuil, M., Deeg, H. J., Dvorak, R., Erikson, A., Ferraz-Mello, S., Fridlund, M., Gandolfi, D., Gazzano, J.-C., Gillon, M., Guenther, E. W., Guillot, T., Hatzes, A., Havel, M., Hébrard, G., Jorda, L., Léger, A., Llebaria, A., Lammer, H., Lovis, C., Mazeh, T., Moutou, C., Ofir, A., von Paris, P., Pätzold, M., Queloz, D., Rauer, H., Rouan, D., Santerne, A., Schneider, J., Tingley, B., Titz-Weider, R., and Wuchterl, G.

Abstract

We announce the discovery of the transiting planet CoRoT-13b. Ground-based follow-up in CFHT and IAC80 confirmed CoRoT’s observations. The mass of the planet was measured with the HARPS spectrograph and the properties of the host star were obtained analyzing HIRES spectra from the Keck telescope. It is a hot Jupiter-like planet with an orbital period of 4.04 days, 1.3 Jupiter masses, 0.9 Jupiter radii, and a density of 2.34 g cm-3. It orbits a G0V star with Teff= 5945 K, M∗= 1.09 M⊙, R∗= 1.01 R⊙, solar metallicity, a lithium content of  + 1.45 dex, and an estimated age of between 0.12 and 3.15 Gyr. The lithium abundance of the star is consistent with its effective temperature, activity level, and age range derived from the stellar analysis. The density of the planet is extreme for its mass, implies that heavy elements are present with a mass of between about 140 and 300 M⊕.

Published
2010
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