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
Artikel i vetenskaplig tidskrift, 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
Författare
S. Csizmadia
Deutsches Zentrums für Luft- und Raumfahrt (DLR)
A. Hatzes
D. Gandolfi
Universität Heidelberg
Universita degli Studi di Torino
M. Deleuil
Laboratoire d'Astrophysique de Marseille
F. Bouchy
Laboratoire d'Astrophysique de Marseille
Malcolm Fridlund
Chalmers, Rymd- och geovetenskap, Radioastronomi och astrofysik
L. Szabados
Magyar Tudomanyos Akademia
H. Parviainen
University of Oxford
J. Cabrera
Deutsches Zentrums für Luft- und Raumfahrt (DLR)
S. Aigrain
University of Oxford
R. Alonso
Universidad de la Laguna
Instituto de Astrofísica de Canarias
J. M. Almenara
Laboratoire d'Astrophysique de Marseille
A. Baglin
Université Paris Diderot
P. Borde
Laboratoire d'Astrophysique de Bordeaux
A. S. Bonomo
Istituto nazionale di astrofisica (INAF)
H. J. Deeg
Instituto de Astrofísica de Canarias
Universidad de la Laguna
R. F. Diaz
Université de Genève
A. Erikson
Deutsches Zentrums für Luft- und Raumfahrt (DLR)
S. Ferraz-Mello
Universidade de Sao Paulo (USP)
M. T. dos Santos
Universidade de Sao Paulo (USP)
E. W. Guenther
T. Guillot
Université Nice Sophia Antipolis (UNS)
S. Grziwa
Universität zu Köln
G. Hebrard
Université Pierre et Marie Curie (UPMC)
P. Klagyivik
Universidad de la Laguna
Instituto de Astrofísica de Canarias
M. Ollivier
Université Paris-Sud
M. Patzold
Universität zu Köln
H. Rauer
Deutsches Zentrums für Luft- und Raumfahrt (DLR)
Technische Universität Berlin
D. Rouan
Université Paris Diderot
A. Santerne
Universidade do Porto
J. Schneider
Université Paris Diderot
T. Mazeh
Tel Aviv University
G. Wuchterl
S. Carpano
Max-Planck-Gesellschaft
A. Ofir
Weizmann Institute of Science
Astronomy and Astrophysics
0004-6361 (ISSN) 1432-0746 (eISSN)
Vol. 584 A13Infrastruktur
Onsala rymdobservatorium
Ämneskategorier
Fusion, plasma och rymdfysik
DOI
10.1051/0004-6361/201526763