[en] 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_-0.085[SUP]+0.000[/SUP] in degrees, the ratio of the orbital distance to the stellar radius, a/R[SUB]s[/SUB] = 17.36[SUB]-0.25[/SUB][SUP]+0.05[/SUP], and the planet-to-star radius ratio R_p/R_s=0.1047[SUB]-0.0022[/SUB][SUP]+0.0041[/SUP]. 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. The CoRoT space mission, launched on December 27th 2006, has been developed and is operated by CNES, with the contribution of Austria, Belgium, Brazil, ESA, Germany, and Spain. The first CoRoT data will be available to the public in February 2009 from the CoRoT archive: http://idoc-corot.ias.u-psud.fr/ Figures 1, 4 and 5 are only available in electronic form at http://www.aanda.org
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Aigrain, S.; School of Physics, University of Exeter, Exeter, EX4 4QL, UK
Collier Cameron, A.; Sch. Physics & Astronomy, Univ. St Andrews, St Andrews, KY16 9SS, UK
Ollivier, M.; IAS, Université Paris XI, 91405 Orsay, France
Pont, F.; School of Physics, University of Exeter, Exeter, EX4 4QL, UK
Jorda, L.; LAM, Université de Provence, 13388 Marseille, France
Almenara, J. M.; IAC, E-38205 La Laguna, Spain
Alonso, R.; LAM, Université de Provence, 13388 Marseille, France
Barge, P.; LAM, Université de Provence, 13388 Marseille, France
Bordé, P.; IAS, Université Paris XI, 91405 Orsay, France
Bouchy, F.; IAP, Université Pierre & Marie Curie, 75014 Paris, France
Deeg, H.; IAC, E-38205 La Laguna, Spain
de La Reza, R.; ON/MCT, 20921-030, Rio de Janeiro, Brazil
Deleuil, M.; LAM, Université de Provence, 13388 Marseille, France
Dvorak, R.; IfA, University of Vienna, 1180 Vienna, Austria
Erikson, A.; Institute of Planetary Research, DLR, 12489 Berlin, Germany
Fridlund, M.; RSSD, ESA/ESTEC, 2200 Noordwijk, The Netherlands
Gondoin, P.; RSSD, ESA/ESTEC, 2200 Noordwijk, The Netherlands
Gillon, Michaël ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Astrophysique et traitement de l'image
Guillot, T.; OCA, CNRS UMR 6202, BP 4229, 06304 Nice Cedex 4, France
scite shows how a scientific paper has been cited by providing the context of the citation, a classification describing whether it supports, mentions, or contrasts the cited claim, and a label indicating in which section the citation was made.
Bibliography
Aigrain, S., & Irwin, M. 2004, MNRAS, 350, 335
Alonso, R., Auvergne, M., Baglin, A., et al. 2008, A&A, 482, L21
Auvergne, M., Bodin, P., Boisnard, L., et al. 2008, A&A, submitted
Bakos, G. Á., Kovács, G., Torres, G., et al. 2007, ApJ, 670, 826
Barbieri, M., Alonso, R., Laughlin, G., et al. 2007, A&A, 476, L13
Barge, P., Baglin, A., Auvergne, M., et al. 2008, A&A, 482, L17
Barnes, S. A. 2003, ApJ, 586, 464
Bouchy, F., Queloz, D., Deleuil, M., et al. 2008, A&A, 482, L25
Catala, C., Donad, J.-F., Shkolnik, E., Bohlender, D., & Alecian, E. 2007, MNRAS, 374, L42
Claret, A. 2004, A&A, 428, 1001
Collier Cameron, A., Davidson, V. A., Skinner, G., et al. 2008, MNRAS, submitted
Deleuil, M., Moutou, C., Deeg, H. J., et al. 2006, in The CoRoT mission: pre-launch status, ed. M. Fridlund, A. Baglin, L. Conroy, & J. Lochard (Noordwijk: ESA), ESA SP-1306, 341
Deleuil, M., Deeg, H., Alonso, R., et al. 2008, A&A, submitted
Dobbs-Dixon, I., Lin, D. N. C., & Mardling, R. A. 2004, ApJ, 610, 464
Donati, J.-F., Moutou, C., Farès, R., et al. 2008, MNRAS, 385, 1179
Edelson, R. A., & Krolik, J. H. 1988, ApJ, 333, 646
Henry, G. W., & Winn, J. N. 2008, AJ, 135, 68
Jackson, B., Greenberg, R., & Barnes, R. 2008, ApJ, 678, 1396
Johns-Krull, C. M., McCullough, P. R., Burke, C. J., et al. 2008, ApJ, 677, 657
Lanza, A. F. Bonomo, A. S., & Rodonò, M. 2007, A&A, 464, 741
Mandel, K., & Agol, E. 2002, ApJ, 580, L 171
McCullough, P. R., Burke, C. J., Valenti, J. A., et al. 2008, ApJ, submitted, [arXiv:0805.2921]
This website uses cookies to improve user experience. Read more
Save & Close
Accept all
Decline all
Show detailsHide details
Cookie declaration
About cookies
Strictly necessary
Performance
Strictly necessary cookies allow core website functionality such as user login and account management. The website cannot be used properly without strictly necessary cookies.
This cookie is used by Cookie-Script.com service to remember visitor cookie consent preferences. It is necessary for Cookie-Script.com cookie banner to work properly.
Performance cookies are used to see how visitors use the website, eg. analytics cookies. Those cookies cannot be used to directly identify a certain visitor.
Used to store the attribution information, the referrer initially used to visit the website
Cookies are small text files that are placed on your computer by websites that you visit. Websites use cookies to help users navigate efficiently and perform certain functions. Cookies that are required for the website to operate properly are allowed to be set without your permission. All other cookies need to be approved before they can be set in the browser.
You can change your consent to cookie usage at any time on our Privacy Policy page.