Reference : Rate and nature of false positives in the CoRoT exoplanet search
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Space science, astronomy & astrophysics
http://hdl.handle.net/2268/3221
Rate and nature of false positives in the CoRoT exoplanet search
English
Almenara, J. M. [Instituto de Astrofísica de Canarias, C/ Vía Láctea S/N, 38200 La Laguna (Spain)]
Deeg, H. J. [Instituto de Astrofísica de Canarias, C/ Vía Láctea S/N, 38200 La Laguna (Spain)]
Aigrain, S. [School of Physics, University of Exeter, Stocker Road, Exeter EX4 4QL, UK]
Alonso, R. [Laboratoire d'Astrophysique de Marseille, UMR 6110 CNRS, Technopôle de Marseille-à toile, 13388 Marseille Cedex 13, France]
Auvergne, M. [LESIA, UMR 8109 CNRS, Observatoire de Paris, UVSQ, Université Paris-Diderot, 5 place J. Janssen, 92195 Meudon, France]
Baglin, A. [LESIA, UMR 8109 CNRS, Observatoire de Paris, UVSQ, Université Paris-Diderot, 5 place J. Janssen, 92195 Meudon, France]
Barbieri, M. [Laboratoire d'Astrophysique de Marseille, UMR 6110 CNRS, Technopôle de Marseille-à toile, 13388 Marseille Cedex 13, France]
Barge, P. [Laboratoire d'Astrophysique de Marseille, UMR 6110 CNRS, Technopôle de Marseille-à toile, 13388 Marseille Cedex 13, France]
Bordé, P. [Institut d'Astrophysique Spatiale, UMR 8617 CNRS, Bât. 121, Université Paris-Sud, 91405 Orsay, France]
Bouchy, F. [Observatoire de Haute Provence, USR 2207 CNRS, OAMP, 04870 St. Michel l'Observatoire, France]
Bruntt, H. [School of Physics A28, University of Sydney, Australia]
Cabrera, J. [Institute of Planetary Research, DLR, Rutherfordstr. 2, 12489 Berlin, Germany ; LUTH, UMR 8102 CNRS, Observatoire de Paris-Meudon, 5 place J. Janssen, 92195 Meudon, France]
Carone, L. [Rheinisches Institut für Umweltforschung, Universität zu Köln, Abt. Planetenforschung, Aachener Str. 209, 50931 Köln, Germany]
Carpano, S. [Research and Scientific Support Department, European Space Agency, ESTEC, 2200 Noordwijk, The Netherlands]
Catala, C. [LESIA, UMR 8109 CNRS, Observatoire de Paris, UVSQ, Université Paris-Diderot, 5 place J. Janssen, 92195 Meudon, France]
Csizmadia, Szilard [Institute of Planetary Research, DLR, Rutherfordstr. 2, 12489 Berlin, Germany]
de La Reza, R. [Observatório Nacional, Rio de Janeiro, RJ, Brazil]
Deleuil, M. [Laboratoire d'Astrophysique de Marseille, UMR 6110 CNRS, Technopôle de Marseille-à toile, 13388 Marseille Cedex 13, France]
Dvorak, R. [Institute for Astronomy, University of Vienna, Türkenschanzstrasse 17, 1180 Vienna, Austria]
Erikson, A. [Institute of Planetary Research, DLR, Rutherfordstr. 2, 12489 Berlin, Germany]
Fridlund, M. [Research and Scientific Support Department, European Space Agency, ESTEC, 2200 Noordwijk, The Netherlands]
Gandolfi, D. [Thüringer Landessternwarte Tautenburg, Sternwarte 5, 07778 Tautenburg, Germany]
Gillon, Michaël mailto [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Astrophysique et traitement de l'image >]
Gondoin, P. [Research and Scientific Support Department, European Space Agency, ESTEC, 2200 Noordwijk, The Netherlands]
Guenther, E. [Thüringer Landessternwarte Tautenburg, Sternwarte 5, 07778 Tautenburg, Germany]
Guillot, T. [Observatoire de la Côte d'Azur, Laboratoire Cassiopée, CNRS UMR 6202, BP 4229, 06304 Nice Cedex 4, France]
Hatzes, A. [Thüringer Landessternwarte Tautenburg, Sternwarte 5, 07778 Tautenburg, Germany]
Hébrard, G. [Institut d'Astrophysique de Paris, UMR7095 CNRS, Université Pierre & Marie Curie, 98bis Bd Arago, 75014 Paris, France]
Jorda, L. [Laboratoire d'Astrophysique de Marseille, UMR 6110 CNRS, Technopôle de Marseille-à toile, 13388 Marseille Cedex 13, France]
Lammer, H. [Space Research Institute, Austrian Academy of Sciences, Schmiedlstrasse 6, 8042 Graz, Austria]
Léger, A. [Institut d'Astrophysique Spatiale, UMR 8617 CNRS, Bât. 121, Université Paris-Sud, 91405 Orsay, France]
Llebaria, A. [Laboratoire d'Astrophysique de Marseille, UMR 6110 CNRS, Technopôle de Marseille-à toile, 13388 Marseille Cedex 13, France]
Loeillet, B. [Institut d'Astrophysique Spatiale, UMR 8617 CNRS, Bât. 121, Université Paris-Sud, 91405 Orsay, France ; Laboratoire d'Astrophysique de Marseille, UMR 6110 CNRS, Technopôle de Marseille-à toile, 13388 Marseille Cedex 13, France]
Magain, Pierre [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Astrophysique et traitement de l'image >]
Mayor, M. [Observatoire de Genève, Université de Genève, 51 Ch. des Maillettes, 1290 Sauverny, Switzerland]
Mazeh, T. [School of Physics and Astronomy, R. and B. Sackler Faculty of Exact Sciences, Tel Aviv University, Tel Aviv 69978, Israel]
Moutou, C. [Laboratoire d'Astrophysique de Marseille, UMR 6110 CNRS, Technopôle de Marseille-à toile, 13388 Marseille Cedex 13, France]
Ollivier, M. [Institut d'Astrophysique Spatiale, UMR 8617 CNRS, Bât. 121, Université Paris-Sud, 91405 Orsay, France]
Pätzold, M. [Rheinisches Institut für Umweltforschung, Universität zu Köln, Abt. Planetenforschung, Aachener Str. 209, 50931 Köln, Germany]
Pont, F. [School of Physics, University of Exeter, Stocker Road, Exeter EX4 4QL, UK]
Queloz, D. [Observatoire de Genève, Université de Genève, 51 Ch. des Maillettes, 1290 Sauverny, Switzerland]
Rauer, H. [Institute of Planetary Research, DLR, Rutherfordstr. 2, 12489 Berlin, Germany ; Center for Astronomy and Astrophysics, TU Berlin, Hardenbergstr. 36, 10623 Berlin, Germany]
Régulo, C. [Instituto de Astrofísica de Canarias, C/ Vía Láctea S/N, 38200 La Laguna (Spain); Dpto. de Astrofísica, Universidad de La Laguna, La Laguna, 38206 Tenerife, Spain]
Renner, S. [Institute of Planetary Research, DLR, Rutherfordstr. 2, 12489 Berlin, Germany ; Laboratoire d'Astronomie de Lille, Université de Lille 1, 1 impasse de l'Observatoire, 59000 Lille, France ; Institut de Mécanique Céleste et de Calcul des Ephémérides, UMR 8028 du CNRS, 77 avenue Denfert-Rochereau, 75014 Paris, France]
Rouan, D. [LESIA, UMR 8109 CNRS, Observatoire de Paris, UVSQ, Université Paris-Diderot, 5 place J. Janssen, 92195 Meudon, France]
Samuel, B. [Institut d'Astrophysique Spatiale, UMR 8617 CNRS, Bât. 121, Université Paris-Sud, 91405 Orsay, France]
Schneider, J. [LUTH, UMR 8102 CNRS, Observatoire de Paris-Meudon, 5 place J. Janssen, 92195 Meudon, France]
Shporer, A. [School of Physics and Astronomy, R. and B. Sackler Faculty of Exact Sciences, Tel Aviv University, Tel Aviv 69978, Israel]
Wuchterl, G. [Thüringer Landessternwarte Tautenburg, Sternwarte 5, 07778 Tautenburg, Germany]
Zucker, S. [School of Physics and Astronomy, R. and B. Sackler Faculty of Exact Sciences, Tel Aviv University, Tel Aviv 69978, Israel]
1-Oct-2009
Astronomy and Astrophysics
EDP Sciences
506
337-341
Yes (verified by ORBi)
International
0004-6361
1432-0746
Les Ulis
France
[en] techniques: photometric ; stars: binaries: eclipsing ; stars: planetary systems
[en] 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. <BR />Aims: We evaluate the rates and nature of false positives in the CoRoT exoplanets search and compare our results with semiempirical predictions. <BR />Methods: We consider the detected binary and planet candidates in the first three extended CoRoT runs, and classify the results of the follow-up observations completed to verify their planetary nature. We group the follow-up results into undiluted binaries, diluted binaries, and planets and compare their abundances with predictions from the literature. <BR />Results: 83% of the initial detections are classified as false positives using only the CoRoT light-curves, the remaining 17% require follow-up observations. Finally, 12% of the candidates in the follow-up program are planets. The shape of the overall distribution of the false positive rate follows previous predictions, except for candidates with transit depths below about 0.4%. For candidates with transit depths in the range from 0.1-0.4%, CoRoT detections are nearly complete, and this difference from predictions is probably real and dominated by a lower than expected abundance of diluted eclipsing binaries. 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 (RSSD and Science Programme), Germany and Spain.
http://hdl.handle.net/2268/3221
10.1051/0004-6361/200911926
http://adsabs.harvard.edu/abs/2009A%26A...506..337A
http://de.arxiv.org/abs/0908.1172

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