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Title:
Transiting exoplanets from the CoRoT space mission*. XXVIII. CoRoT-33b, an object in the brown dwarf desert with 2:3 commensurability with its host star
Authors:
Csizmadia, Sz.; Hatzes, A.; Gandolfi, D.; Deleuil, M.; Bouchy, F.; Fridlund, M.; Szabados, L.; Parviainen, H.; Cabrera, J.; Aigrain, S.; Alonso, R.; Almenara, J.-M.; Baglin, A.; Bordé, P.; Bonomo, A. S.; Deeg, H. J.; Díaz, R. F.; Erikson, A.; Ferraz-Mello, S.; Tadeu dos Santos, M.; Guenther, E. W.; Guillot, T.; Grziwa, S.; Hébrard, G.; Klagyivik, P.; Ollivier, M.; Pätzold, M.; Rauer, H.; Rouan, D.; Santerne, A.; Schneider, J.; Mazeh, T.; Wuchterl, G.; Carpano, S.; Ofir, A.
Affiliation:
AA(Institute of Planetary Research, German Aerospace Center, Rutherfordstrasse 2, 12489, Berlin, Germany ), AB(Thüringer Landessternwarte, Sternwarte 5, Tautenburg 5, 07778, Tautenburg, Germany), AC(Dipartimento di Fisica, Universitá di Torino, via P. Giuria 1, 10125, Torino, Italy; Landessternwarte Königstuhl, Zentrum für Astronomie der Universität Heidelberg, Königstuhl 12, 69117, Heidelberg, Germany), AD(Aix Marseille Université, CNRS, LAM (Laboratoire d'Astrophysique de Marseille) UMR 7326, 13388, Marseille, France), AE(Aix Marseille Université, CNRS, LAM (Laboratoire d'Astrophysique de Marseille) UMR 7326, 13388, Marseille, France), AF(Max-Planck-Institut für Astronomie, Königstuhl 17, 69117, Heidelberg, Germany; Leiden Observatory, University of Leiden, PO Box 9513, 2300 RA, Leiden, The Netherlands; Department of Earth and Space Sciences, Chalmers University of Technology, Onsala Space Observatory, 439 92, Onsala, Sweden), AG(Konkoly Observatory of the Hungarian Academy of Sciences, MTA CSFK, Budapest, Konkoly Thege Miklós út, 15-17, Hungary), AH(Sub-department of Astrophysics, Department of Physics, University of Oxford, Oxford, OX1 3RH, UK), AI(Institute of Planetary Research, German Aerospace Center, Rutherfordstrasse 2, 12489, Berlin, Germany), AJ(Department of Physics, Denys Wilkinson Building, Keble Road, Oxford, OX1 3RH, UK), AK(Instituto de Astrofísica de Canarias, 38205, La Laguna, Tenerife, Spain; Universidad de La Laguna, Dept. de Astrofísica, 38206, La Laguna, Tenerife, Spain), AL(Aix Marseille Université, CNRS, LAM (Laboratoire d'Astrophysique de Marseille) UMR 7326, 13388, Marseille, France), AM(LESIA, UMR 8109 CNRS, Observatoire de Paris, UPMC, Université Paris-Diderot, 5 place J. Janssen, 92195, Meudon, France), AN(LAB, UMR 5804, Univ. Bordeaux & CNRS, 33270, Floirac, France), AO(INAF-Osservatorio Astrofisico di Torino Strada Osservatorio, 20 10025, Pino Torinese, TO, Italy), AP(Instituto de Astrofísica de Canarias, 38205, La Laguna, Tenerife, Spain; Universidad de La Laguna, Dept. de Astrofísica, 38206, La Laguna, Tenerife, Spain), AQ(Observatoire astronomique de l'Université de Genève, 51 ch. des Maillettes, 1290, Versoix, Switzerland), AR(Institute of Planetary Research, German Aerospace Center, Rutherfordstrasse 2, 12489, Berlin, Germany), AS(IAG-Universidade de São Paulo, 1226, Sâo Paulo, Brasil), AT(IAG-Universidade de São Paulo, 1226, Sâo Paulo, Brasil), AU(Thüringer Landessternwarte, Sternwarte 5, Tautenburg 5, 07778, Tautenburg, Germany), AV(Université de Nice-Sophia Antipolis, CNRS UMR 6202, Observatoire de la Côte d'Azur, BP 4229, 06304, Nice Cedex 4, France), AW(Rheinisches Institut für Umweltforschung an der Universität zu Köln, 50931, Aachener Strasse 209, Germany), AX(Institut d'Astrophysique de Paris, UMR 7095 CNRS, Université Pierre & Marie Curie, 98bis boulevard Arago, 75014, Paris, France), AY(Instituto de Astrofísica de Canarias, 38205, La Laguna, Tenerife, Spain; Universidad de La Laguna, Dept. de Astrofísica, 38206, La Laguna, Tenerife, Spain), AZ(Institut d'Astrophysique Spatiale, Université Paris XI, 91405, Orsay, France), BA(Rheinisches Institut für Umweltforschung an der Universität zu Köln, 50931, Aachener Strasse 209, Germany), BB(Institute of Planetary Research, German Aerospace Center, Rutherfordstrasse 2, 12489, Berlin, Germany; Center for Astronomy and Astrophysics, TU Berlin, Hardenbergstr. 36, 10623, Berlin, Germany), BC(LESIA, UMR 8109 CNRS, Observatoire de Paris, UPMC, Université Paris-Diderot, 5 place J. Janssen, 92195, Meudon, France), BD(Instituto de Astrofísica e Ciências do Espaço, Universidade do Porto, CAUP, Rua das Estrelas, 4150-762, Porto, Portugal), BE(LUTH, Observatoire de Paris, UMR 8102 CNRS, Université Paris Diderot, 5 place Jules Janssen, 92195, Meudon, France), BF(School of Physics and Astronomy, Raymond and Beverly Sackler Faculty of Exact Sciences, 39040, Tel Aviv University, Tel Aviv, Israel), BG(Thüringer Landessternwarte, Sternwarte 5, Tautenburg 5, 07778, Tautenburg, Germany), BH(Max-Planck-Institut für extraterrestrische Physik, Giessenbachstrasse 1, 85748, Garching, Germany), BI(Department of Earth and Planetary Sciences, Weizmann Institute of Science, 234 Herzl St., 76100, Rehovot, Israel)
Publication:
Astronomy & Astrophysics, Volume 584, id.A13, 12 pp. (A&A Homepage)
Publication Date:
12/2015
Origin:
EDP Sciences
Astronomy Keywords:
brown dwarfs, stars: rotation, eclipses
DOI:
10.1051/0004-6361/201526763
Bibliographic Code:
2015A&A...584A..13C

Abstract

We report the detection of a rare transiting brown dwarf with a mass of 59 MJup and radius of 1.1 RJup around the metal-rich, [Fe/H] = +0.44, G9V star CoRoT-33. The orbit is eccentric (e = 0.07) with a period of 5.82 d. The companion, CoRoT-33b, is thus a new member in the so-called brown dwarf desert. The orbital period is within 3% to a 3:2 resonance with the rotational period of the star. CoRoT-33b may be an important test case for tidal evolution studies. The true frequency of brown dwarfs close to their host stars (P< 10 d) is estimated to be approximately 0.2% which is about six times smaller than the frequency of hot Jupiters in the same period range. We suspect that the frequency of brown dwarfs declines faster with decreasing period than that of giant planets.

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. Based on observations made with HARPS (High Accuracy Radial velocity Planet Searcher) spectrograph on the 3.6-m European Organisation for Astronomical Research in the Southern Hemisphere telescope at La Silla Observatory, Chile (ESO program 188.C-0779).Based on observations obtained with the Nordic Optical Telescope, operated on the island of La Palma jointly by Denmark, Finland, Iceland, Norway, and Sweden, in the Spanish Observatorio del Roque de los Muchachos of the Instituto de Astrofisica de Canarias, in time allocated by the Spanish Time Allocation Committee (CAT).


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