Transiting exoplanets from the CoRoT space mission. IV. CoRoT-Exo-4b: a transiting planet in a 9.2 day synchronous orbit

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Transiting exoplanets from the CoRoT space mission. IV. CoRoT-Exo-4b: a transiting planet in a 9.2 day synchronous orbit

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dc.contributor.author Aigrain, Suzanne en_GB
dc.contributor.author Collier Cameron, A. en_GB
dc.contributor.author Ollivier, M. en_GB
dc.contributor.author Pont, F. en_GB
dc.contributor.author Jorda, L. en_GB
dc.contributor.author Almenara, J.-M. en_GB
dc.contributor.author Alonso, R. en_GB
dc.contributor.author Barge, P. en_GB
dc.contributor.author Bordé, P. en_GB
dc.contributor.author Bouchy, F. en_GB
dc.contributor.author Deeg, H. J. en_GB
dc.contributor.author De la Reza, R. en_GB
dc.contributor.author Deleuil, M. en_GB
dc.contributor.author Dvorak, R. en_GB
dc.contributor.author Erikson, A. en_GB
dc.contributor.author Fridlund, M. en_GB
dc.contributor.author Gondoin, P. en_GB
dc.contributor.author Gillon, M. en_GB
dc.contributor.author Guillot, T. en_GB
dc.contributor.author Hatzes, A. en_GB
dc.contributor.author Lammer, H. en_GB
dc.contributor.author Lanza, A. F. en_GB
dc.contributor.author Léger, A. en_GB
dc.contributor.author Llebaria, A. en_GB
dc.contributor.author Magain, P. en_GB
dc.contributor.author Mazeh, T. en_GB
dc.contributor.author Moutou, C. en_GB
dc.contributor.author Pätzold, M. en_GB
dc.contributor.author Pinte, C. en_GB
dc.contributor.author Queloz, D. en_GB
dc.contributor.author Rauer, H. en_GB
dc.contributor.author Rouan, D. en_GB
dc.contributor.author Schneider, J. en_GB
dc.contributor.author Wuchterl, G. en_GB
dc.contributor.author Zucker, S. en_GB
dc.date.accessioned 2009-12-08T14:55:23Z en_GB
dc.date.accessioned 2011-01-25T11:55:03Z en_US
dc.date.accessioned 2013-03-20T13:15:03Z
dc.date.issued 2008 en_GB
dc.description.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+0.000 −0.085 in degrees, the ratio of the orbital distance to the stellar radius, a/Rs = 17.36+0.05−0.25, and the planet-to-star radius ratio Rp/Rs = 0.1047+0.0041−0.0022.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. en_GB
dc.identifier.citation 488 (2), pp. L43-L46 en_GB
dc.identifier.doi 10.1051/0004-6361:200810246 en_GB
dc.identifier.uri http://hdl.handle.net/10036/87615 en_GB
dc.language.iso en en_GB
dc.publisher EDP Sciences en_GB
dc.relation.url http://dx.doi.org/10.1051/0004-6361:200810246 en_GB
dc.subject photometric techniques en_GB
dc.subject planetary systems en_GB
dc.subject stars: rotation en_GB
dc.title Transiting exoplanets from the CoRoT space mission. IV. CoRoT-Exo-4b: a transiting planet in a 9.2 day synchronous orbit en_GB
dc.type Article en_GB
dc.date.available 2009-12-08T14:55:23Z en_GB
dc.date.available 2011-01-25T11:55:03Z en_US
dc.date.available 2013-03-20T13:15:03Z
dc.identifier.issn 0004-6361 en_GB
dc.identifier.issn 1432-0746 en_GB
dc.description Copyright © The European Southern Observatory (ESO) en_GB
dc.identifier.journal Astronomy and Astrophysics en_GB


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