Year: 2014
Type: article
Abstract: The CoRoT satellite has provided high-precision photometric light curves for more than 163,000 stars and found several hundreds of transiting systems compatible with a planetary scenario. If ground-based velocimetric observations are the best way to identify the actual planets among many possible configurations of eclipsing binary systems, recent transit surveys have shown that it is not always within reach of the radial-velocity detection limits. In this paper, we present a transiting exoplanet candidate discovered by CoRoT whose nature cannot be established from ground-based observations, and where extensive analyses are used to validate the planet scenario. They are based on observing constraints from radial-velocity spectroscopy, adaptive optics imaging and the CoRoT transit shape, as well as from priors on stellar populations, planet and multiple stellar systems frequency. We use the fully Bayesian approach developed in the PASTIS analysis software, and conclude that the planet scenario is at least 1400 times more probable than any other false positive scenario. The primary star is a metallic solar-like dwarf, with Ms = 1.099+-0.049 Msun and Rs = 1.136 (+0.038,-0.090) Rsun . The validated planet has a radius of Rp = 4.88 (+0.17,-0.39) RE and mass less than 49 ME. Its mean density is smaller than 2.56 g/cm^3 and orbital period is 9.7566+-0.0012 days. This object, called CoRoT-22 b, adds to a large number of validated Kepler planets. These planets do not have a proper measurement of the mass but allow statistical characterization of the exoplanet population.
Authors: C. Moutou, J. M. Almenara, R. F. Díaz, R. Alonso, M. Deleuil, E. Guenther, T. Pasternacki, S. Aigrain, A. Baglin, P. Barge, A. S. Bonomo, P. Bordé, F. Bouchy, J. Cabrera, S. Carpano, W. D. Cochran, Sz. Csizmadia, H. J. Deeg, R. Dvorak, M. Endl, A. Erikson, S. Ferraz-Mello, M. Fridlund, D. Gandolfi, T. Guillot, A. Hatzes, G. Hébrard, C. Lovis, H. Lammer, P. J. MacQueen, T. Mazeh, A. Ofir, M. Ollivier, M. Pätzold, H. Rauer, D. Rouan, A. Santerne, J. Schneider, B. Tingley, G. Wuchterl
Institutions: Centre National de la Recherche Scientifique, Laboratoire d’Astrophysique de Marseille, Aix-Marseille Université, University of Geneva, Universidad de La Laguna, Thüringer Landessternwarte Tautenburg, Deutsches Zentrum für Luft- und Raumfahrt e. V. (DLR), University of Oxford, Observatoire de Paris, Osservatorio Astrofisico di Torino, Université Paris-Saclay, European Space Research and Technology Centre, The University of Texas at Austin, University of Vienna, Universidade de São Paulo, Heidelberg University, Observatoire de la Côte d’Azur, Austrian Academy of Sciences, Institut d'Astrophysique de Paris, Tel Aviv University, University of Göttingen, University of Cologne, Technische Universität Berlin, Universidade do Porto, Université Paris Diderot, Aarhus University
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: bronze
Funders: National Science Foundation, National Aeronautics and Space Administration, W. M. Keck Foundation, California Institute of Technology, Agence Nationale de la Recherche, Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung, Centre National d’Etudes Spatiales, Centre National de la Recherche Scientifique, Ministerio de Ciencia e Innovación, Science and Technology Facilities Council
Awards: Transiting planets with the CoRoT space mission, Recherche et caracterisation des exoplanetes de type super-Terres, THE MCDONALD OBSERVATORY PLANET SEARCH PROGRAM WE PROPOSE TO CONTINUE AND EXTEND THE MCDONALD OBSERVATORY PLANET SEARCH PROGRAM. THIS HIGH-PRECISION, Astrophysics and Planetary Science at Oxford 2013-16
OpenAlex ID: W2131276688