Now showing items 1-20 of 27

  • Accuracy of stellar parameters of exoplanet-host stars determined from asteroseismology 

    Mulet-Marquis, C.; Baraffe, I.; Aigrain, Suzanne; Pont, F. (EDP Sciences, 2009)
    Context. In the context of the space-based mission CoRoT, devoted to asteroseismology and search for planet transits, we analyse the accuracy of fundamental stellar parameters (mass, radius, luminosity) that can be obtained ...
  • Bayesian detection of planetary transits. A modified version of the Gregory-Loredo method for Bayesian periodic signal detection 

    Aigrain, Suzanne; Favata, F. (EDP Sciences, 2002)
    The detection of planetary transits in stellar photometric light-curves is poised to become the main method for finding substantial numbers of terrestrial planets. The French-European mission COROT (foreseen for launch in ...
  • Characterising stellar micro-variability for planetary transit searches 

    Aigrain, Suzanne; Favata, F.; Gilmore, G. (EDP Sciences, 2004)
    A method for simulating light curves containing stellar micro-variability for a range of spectral types and ages is presented. It is based on parameter-by-parameter scaling of a multi-component fit to the solar irradiance ...
  • Comparative blind test of five planetary transit detection algorithms on realistic synthetic light curves 

    Moutou, C.; Pont, F.; Barge, P.; Aigrain, Suzanne; Auvergne, M.; Blouin, D.; Cautain, R.; Erikson, A.; Guis, V.; Guterman, P.; Irwin, M.; Lanza, A. F.; Queloz, D.; Rauer, H.; Voss, H.; Zucker, S. (EDP Sciences, 2005)
    Because photometric surveys of exoplanet transits are very promising sources of future discoveries, many algorithms are being developed to detect transit signals in stellar light curves. This paper compares such algorithms ...
  • Detecting planetary transits in the presence of stellar variability. Optimal filtering and the use of colour information 

    Carpano, S.; Aigrain, Suzanne; Favata, F. (EDP Sciences, 2003)
    Space-based photometric transit searches, such as the ESA mission Eddington (planned for launch in 2007), are expected to detect large numbers of terrestrial planets outside the solar system, including some Earth-like ...
  • Ground-based photometry of space-based transit detections: photometric follow-up of the CoRoT mission 

    Deeg, H. J.; Gillon, M.; Shporer, A.; Rouan, D.; Stecklum, B.; Aigrain, Suzanne; Alapini, Aude; Almenara, J.-M.; Alonso, R.; Barbieri, M.; Bouchy, F.; Eislöffel, J.; Erikson, A.; Fridlund, M.; Eigmüller, P.; Handler, G.; Hatzes, A.; Kabath, P.; Lendl, M.; Mazeh, T.; Moutou, C.; Queloz, D.; Rauer, H.; Rabus, M.; Tingley, B.; Titz, R. (EDP Sciences, 2009)
    The motivation, techniques and performance of the ground-based photometric follow-up of transit detections by the CoRoT space mission are presented. Its principal raison d'être arises from the much higher spatial resolution ...
  • Magnetic activity in the photosphere of CoRoT-Exo-2a. Active longitudes and short-term spot cycle in a young Sun-like star 

    Lanza, A. F.; Pagano, I.; Leto, G.; Messina, S.; Aigrain, Suzanne; Alonso, R.; Auvergne, M.; Baglin, A.; Barge, P.; Bonomo, A. S.; Boumier, P.; Collier Cameron, A.; Comparato, M.; Cutispoto, G.; De Medeiros, J. R.; Foing, B.; Kaiser, A.; Moutou, C.; Parihar, P. S.; Silva-Valio, A.; Weiss, W. W. (EDP Sciences, 2009)
    Context. The space experiment CoRoT has recently detected transits by a hot Jupiter across the disc of an active G7V star (CoRoTExo-2a) that can be considered as a good proxy for the Sun at an age of approximately 0.5 ...
  • Modelling solar-like variability for the detection of Earth-like planetary transits. II. Performance of the three-spot modelling, harmonic function fitting, iterative nonlinear filtering, and sliding boxcar filtering 

    Bonomo, A. S.; Aigrain, Suzanne; Bordé, P.; Lanza, A. F. (EDP Sciences, 2009)
    Aims. As an extension of a previous work, we present a comparison of four methods of filtering solar-like variability to increase the efficiency of detection of Earth-like planetary transits by means of box-shaped transit ...
  • Noise properties of the CoRoT data. A planet-finding perspective 

    Aigrain, Suzanne; Pont, F.; Fressin, F.; Alapini, Aude; Alonso, R.; Auvergne, M.; Barbieri, M.; Barge, P.; Bordé, P.; Bouchy, F.; Deeg, H. J.; 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.; Wuchterl, G.; Zucker, S. (EDP Sciences, 2009)
    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 ...
  • The photospheric abundances of active binaries. I. Detailed analysis of HD 113816 (IS Vir) and HD 119285 (V851 Cen) 

    Katz, D.; Favata, F.; Aigrain, Suzanne; Micela, G. (EDP Sciences, 2003)
    The high-resolution optical spectra of the two X-ray active binaries RS CVn stars HD113816 (IS Vir) and HD119285 (V851 Cen) are analysed and their Na, Mg, Al, Si, Ca, Sc, Ti, Co and Ni contents determined, in the framework ...
  • Photospheric activity and rotation of the planet-hosting star CoRoT-4a 

    Lanza, A. F.; Aigrain, Suzanne; Messina, S.; Leto, G.; Pagano, I.; Auvergne, M.; Baglin, A.; Barge, P.; Bonomo, A. S.; Collier Cameron, A.; Cutispoto, G.; Deleuil, M.; De Medeiros, J. R.; Foing, B.; Moutou, C. (EDP Sciences, 2009)
    Aims. The space experiment CoRoT has recently detected a transiting hot Jupiter in orbit around a moderately active F-type mainsequence star (CoRoT-4a). This planetary system is of particular interest because it has an ...
  • Planetary transit candidates in Corot-IRa01 field 

    Carpano, S.; Cabrera, J.; Alonso, R.; Barge, P.; Aigrain, Suzanne; 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. (EDP Sciences, 2009)
    Context. CoRoT is a pioneering space mission devoted to the analysis of stellar variability and the photometric detection of extrasolar planets. Aims. We present the list of planetary transit candidates detected in the ...
  • Planetary transit candidates in CoRoT-LRc01 field 

    Cabrera, J.; Fridlund, M.; Ollivier, M.; Gandolfi, D.; Csizmadia, Sz.; Alonso, R.; Aigrain, Suzanne; Alapini, Aude; 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.; Hébrard, 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. (EDP Sciences, 2009)
    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. Methods. ...
  • Planetary transit candidates in the CoRoT initial run: resolving their nature 

    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. W.; Hatzes, A.; Hébrard, G.; Loeillet, B.; Mayor, M.; Mazeh, T.; Queloz, D.; Rabus, M.; Rouan, D.; Shporer, A.; Udry, S.; Aigrain, Suzanne; 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. (EDP Sciences, 2009)
    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 ...
  • Rate and nature of false positives in the CoRoT exoplanet search 

    Almenara, J.-M.; Deeg, H. J.; Aigrain, Suzanne; 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. W.; 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. (EDP Sciences, 2009)
    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 ...
  • Removing systematics from the CoRoT light curves. I. Magnitude-dependent zero point 

    Mazeh, T.; Guterman, P.; Aigrain, Suzanne; Zucker, S.; Grinberg, N.; Alapini, Aude; Alonso, R.; Auvergne, M.; Barbieri, M.; Barge, P.; Bordé, P.; Bouchy, F.; Deeg, H. J.; 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. (EDP Sciences, 2009)
    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 ...
  • The secondary eclipse of CoRoT-1b 

    Alonso, R.; Alapini, Aude; Aigrain, Suzanne; 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. (EDP Sciences, 2009)
    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 ...
  • The secondary eclipse of the transiting exoplanet CoRoT-2b 

    Alonso, R.; Guillot, T.; Mazeh, T.; Aigrain, Suzanne; Alapini, Aude; Barge, P.; Hatzes, A.; Pont, F. (EDP Sciences, 2009)
    We present a study of the light curve of the transiting exoplanet CoRoT-2b, aimed at detecting the secondary eclipse and measuring its depth. The data were obtained with the CoRoT satellite during its first run of more ...
  • Spin-orbit misalignment in the HD 80606 planetary system 

    Pont, F.; Hébrard, G.; Irwin, J. M.; Bouchy, F.; Moutou, C.; Ehrenreich, D.; Guillot, T.; Aigrain, Suzanne; Bonfils, X.; Berta, Z.; Boisse, I.; Burke, C.; Charbonneau, D.; Delfosse, X.; Desort, M.; Eggenberger, A.; Forveille, T.; Lagrange, A.-M.; Lovis, C.; Nutzman, P.; Pepe, F.; Perrier, C.; Queloz, D.; Santos, N.C.; Ségransan, D.; Udry, S.; Vidal-Madjar, A. (EDP Sciences, 2009)
    We recently reported the photometric and spectroscopic detection of the primary transit of the 111-day-period, eccentric extra-solar planet HD80606b, at Observatoire de Haute-Provence, France. The whole egress of the primary ...
  • Transiting exoplanets from the CoRoT space mission. I. CoRoT-Exo-1b: a low-density short-period planet around a G0V star 

    Barge, P.; Baglin, A.; Auvergne, M.; Rauer, H.; Léger, A.; Schneider, J.; Pont, F.; Aigrain, Suzanne; Almenara, J.-M.; Alonso, R.; Barbieri, M.; Bordé, P.; Bouchy, F.; Deeg, H. J.; De la Reza, R.; Deleuil, M.; Dvorak, R.; Erikson, A.; Fridlund, M.; Gillon, M.; Gondoin, P.; Guillot, T.; Hatzes, A.; Hébrard, G.; Jorda, L.; Kabath, P.; Lammer, H.; Llebaria, A.; Loeillet, B.; Magain, P.; Mazeh, T.; Moutou, C.; Ollivier, M.; Pätzold, M.; Queloz, D.; Rouan, D.; Shporer, A.; Wuchterl, G. (EDP Sciences, 2008)
    Context. The pioneer space mission for photometric planet searches, CoRoT, steadily monitors about 12 000 stars in each of its fields of view. Transit candidates can be detected early in the processing of the data and ...