Reference : CoRoT LRa02_E2_0121: Neptune-size planet candidate turns into a hierarchical triple s...
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Space science, astronomy & astrophysics
http://hdl.handle.net/2268/102253
CoRoT LRa02_E2_0121: Neptune-size planet candidate turns into a hierarchical triple system with a giant primary
English
Tal-Or, L. [School of Physics and Astronomy, Raymond and Beverly Sackler Faculty of Exact Sciences, Tel Aviv University, Tel Aviv, Israel]
Santerne, A. [Laboratoire d'Astrophysique de Marseille, Université de Provence & CNRS, 38 rue Frédéric Joliot-Curie, 13388, Marseille Cedex 13, France]
Mazeh, T. [School of Physics and Astronomy, Raymond and Beverly Sackler Faculty of Exact Sciences, Tel Aviv University, Tel Aviv, Israel]
Bouchy, F. [Observatoire de Haute Provence, CNRS/OAMP, 04870 St Michel l', Observatoire, France; Institut d'Astrophysique de Paris, UMR7095 CNRS, Université Pierre & Marie Curie, 98bis Bd Arago, 75014, Paris, France]
Moutou, C. [Laboratoire d'Astrophysique de Marseille, Université de Provence & CNRS, 38 rue Frédéric Joliot-Curie, 13388, Marseille Cedex 13, France]
Alonso, R. [Observatoire de l'Université de Genève, 51 chemin des Maillettes, 1290, Sauverny, Switzerland]
Gandolfi, D. [Research and Scientific Support Department, ESTEC/ESA, Keplerlaan 1, 2200AG, Noordwijk, The Netherlands]
Aigrain, S. [Oxford Astrophyiscs, Denys Wilkinson Building, Keble Road, Oxford, OX1 3RH, UK]
Auvergne, M. [LESIA, Observatoire de Paris, Place Jules Janssen, 92195, Meudon Cedex, France]
Barge, P. [Laboratoire d'Astrophysique de Marseille, Université de Provence & CNRS, 38 rue Frédéric Joliot-Curie, 13388, Marseille Cedex 13, France]
Bonomo, A. S. [Laboratoire d'Astrophysique de Marseille, Université de Provence & CNRS, 38 rue Frédéric Joliot-Curie, 13388, Marseille Cedex 13, France]
Bordé, P. [Institut d'Astrophysique Spatiale, Université Paris XI, 91405, Orsay, France]
Deeg, H. [Instituto de Astrofísica de Canarias, 38205 La Laguna, Tenerife, Spain; Universidad de La Laguna, Dept. de Astrofísica, 38200 La Laguna, Tenerife, Spain]
Ferraz-Mello, S. [IAG, University of São Paulo, Brasil]
Deleuil, M. [Laboratoire d'Astrophysique de Marseille, Université de Provence & CNRS, 38 rue Frédéric Joliot-Curie, 13388, Marseille Cedex 13, France]
Dvorak, R. [University of Vienna, Institute of Astronomy, Türkenschanzstr. 17, 1180, Vienna, Austria]
Erikson, A. [Institute of Planetary Research, German Aerospace Center, Rutherfordstrasse 2, 12489, Berlin, Germany]
Fridlund, M. [Research and Scientific Support Department, ESTEC/ESA, Keplerlaan 1, 2200AG, Noordwijk, The Netherlands]
Gillon, Michaël mailto [Oxford Astrophyiscs, Denys Wilkinson Building, Keble Road, Oxford, OX1 3RH, UK; University of Liège, Allée du 6 août 17, Sart Tilman, Liège 1, Belgium]
Guenther, E. W. [Thüringer Landessternwarte, Sternwarte 5, Tautenburg, 07778, Tautenburg, Germany]
Guillot, T. [Université de Nice-Sophia Antipolis, CNRS UMR 6202, Observatoire de la Côte d'Azur, BP 4229, 06304, Nice Cedex 4, France]
Hatzes, A. [Thüringer Landessternwarte, Sternwarte 5, Tautenburg, 07778, Tautenburg, Germany]
Jorda, L. [Laboratoire d'Astrophysique de Marseille, Université de Provence & CNRS, 38 rue Frédéric Joliot-Curie, 13388, Marseille Cedex 13, France]
Lammer, H. [Space Research Institute, Austrian Academy of Science, Schmiedlstr. 6, 8042, Graz, Austria]
Léger, A. [Institut d'Astrophysique Spatiale, Université Paris XI, 91405, Orsay, France]
Llebaria, A. [Laboratoire d'Astrophysique de Marseille, Université de Provence & CNRS, 38 rue Frédéric Joliot-Curie, 13388, Marseille Cedex 13, France]
Ollivier, M. [Institut d'Astrophysique Spatiale, Université Paris XI, 91405, Orsay, France]
Pätzold, M. [Rheinisches Institut für Umweltforschung an der Universität zu Köln, Aachener Strasse 209, 50931, Köln, Germany]
Queloz, D. [Observatoire de l'Université de Genève, 51 chemin des Maillettes, 1290, Sauverny, Switzerland]
Rauer, H. [Institute of Planetary Research, German Aerospace Center, Rutherfordstrasse 2, 12489, Berlin, Germany; Center for Astronomy and Astrophysics, TU Berlin, Hardenbergstr. 36, 10623, Berlin, Germany]
Rouan, D. [LESIA, Observatoire de Paris, Place Jules Janssen, 92195, Meudon Cedex, France]
Tsodikovich, Y. [School of Physics and Astronomy, Raymond and Beverly Sackler Faculty of Exact Sciences, Tel Aviv University, Tel Aviv, Israel]
Wuchterl, G. [Thüringer Landessternwarte, Sternwarte 5, Tautenburg, 07778, Tautenburg, Germany]
1-Oct-2011
Astronomy and Astrophysics
EDP Sciences
534
67
Yes (verified by ORBi)
International
0004-6361
1432-0746
Les Ulis
France
[en] planetary systems ; binaries: eclipsing ; techniques: photometric ; techniques: radial velocities
[en] 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. Based on observations made with the 1.93-m telescope at Observatoire de Haute-Provence (CNRS), France, the 3.6-m telescope at La Silla Observatory (ESO), Chile (program 184.C-0639), the VLT at Paranal Observatory (ESO), Chile (program 083.C-0690), and the 2.1-m Otto Struve telescope at McDonald Observatory, Texas, USA.
http://hdl.handle.net/2268/102253
10.1051/0004-6361/201117374
http://adsabs.harvard.edu/abs/2011A%26A...534A..67T
http://de.arxiv.org/abs/1108.5623

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