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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

Journal
Date Issued
2015
Author(s)
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.
•
•
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.
DOI
Description
The team at IAC acknowledges support by grant AYA2012-39346-C02-02 of the Spanish Secretary of State for RDi (MICINN). R.A. acknowledges the Spanish Ministry of Economy and Competitiveness (MINECO) for the financial support under the Ramón y Cajal program RYC-2010-06519. This research has made use of the ExoDat database, operated at LAM-OAMP, Marseille, France, on behalf of the CoRoT/Exoplanet program. This publication makes use of data products from the Two Micron All Sky Survey, which is a joint project of the University of Massachusetts and the Infrared Processing and Analysis Center/California Institute of Technology, funded by the National Aeronautics and Space Administration and the National Science Foundation. This research has made use of NASA’s Astrophysics Data System. L. Szabados was supported by the ESTEC Contract No. 4000106398/12/NL/KML. The first author thanks the Hungarian OTKA Grant K113117. The German CoRoT Team (TLS and the University of Cologne) acknowledges DLR grants 50 OW 204, 50 OW 0603 and 50QP07011. This research has benefited from the M, L, T, and Y dwarf compendium housed at DwarfArchives.org. H.P. has received support from the Leverhulme Research Project grant RPG-2012-661. A.S. is supported by the European Union under a Marie Curie Intra-European Fellowship for Career Development with reference FP7-PEOPLE-2013-IEF, number 627202 and by Fundação para a Ciência e a Tecnologia (FCT) through the research grant UID/FIS/04434/2013. J.M.A. acknowledges support by CNES grant 251091. The prompt and valuable report of an anonymous referee is acknowledged.
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).

Volume
584
Start page
A13
Uri
Url
Issn Identifier
0004-6361
Ads BibCode
2015A&A...584A..13C
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open.access
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