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 article, 2015
We report the detection of a rare transiting brown dwarf with a mass of 59 M-Jup and radius of 1.1 R-Jup 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.
stars: rotation
eclipses
brown dwarfs
Author
S. Csizmadia
German Aerospace Center (DLR)
A. Hatzes
D. Gandolfi
Heidelberg University
University of Turin
M. Deleuil
Laboratoire d'Astrophysique de Marseille
F. Bouchy
Laboratoire d'Astrophysique de Marseille
Malcolm Fridlund
Chalmers, Earth and Space Sciences, Radio Astronomy and Astrophysics
L. Szabados
Hungarian Academy of Sciences
H. Parviainen
University of Oxford
J. Cabrera
German Aerospace Center (DLR)
S. Aigrain
University of Oxford
R. Alonso
University of La Laguna
Instituto de Astrofísica de Canarias
J. M. Almenara
Laboratoire d'Astrophysique de Marseille
A. Baglin
Paris Diderot University
P. Borde
Laboratoire d'Astrophysique de Bordeaux
A. S. Bonomo
Istituto nazionale di astrofisica (INAF)
H. J. Deeg
Instituto de Astrofísica de Canarias
University of La Laguna
R. F. Diaz
University of Geneva
A. Erikson
German Aerospace Center (DLR)
S. Ferraz-Mello
University of Sao Paulo (USP)
M. T. dos Santos
University of Sao Paulo (USP)
E. W. Guenther
T. Guillot
Université Nice Sophia Antipolis (UNS)
S. Grziwa
University of Cologne
G. Hebrard
Pierre and Marie Curie University (UPMC)
P. Klagyivik
University of La Laguna
Instituto de Astrofísica de Canarias
M. Ollivier
University of Paris-Sud
M. Patzold
University of Cologne
H. Rauer
German Aerospace Center (DLR)
Technische Universität Berlin
D. Rouan
Paris Diderot University
A. Santerne
University of Porto
J. Schneider
Paris Diderot University
T. Mazeh
Tel Aviv University
G. Wuchterl
S. Carpano
Max Planck Society
A. Ofir
Weizmann Institute of Science
Astronomy and Astrophysics
0004-6361 (ISSN) 1432-0746 (eISSN)
Vol. 584 A13Infrastructure
Onsala Space Observatory
Subject Categories
Fusion, Plasma and Space Physics
DOI
10.1051/0004-6361/201526763