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
Szilard Csizmadia
(1)
,
Artie P. Hatzes
(2)
,
Davide Gandolfi
(3)
,
Magali Deleuil
(4)
,
François Bouchy
(4)
,
Malcolm C. Fridlund
(5)
,
L. Szabados
(6)
,
H. Parviainen
(7)
,
Juan Cabrera
(1)
,
Suzanne Aigrain
(8)
,
Roi Alonso
(9)
,
J. M. Almenara
(4)
,
Annie Baglin
(10, 11, 12)
,
P. Bordé
(13)
,
Aldo Stefano Bonomo
(14)
,
Hans J. Deeg
(9)
,
R. F. Díaz
(15)
,
Anders Erikson
(1)
,
Sylvio Ferraz-Mello
(16)
,
M. Tadeu dos Santos
(16)
,
Eike Guenther
(2)
,
Tristan Guillot
(17)
,
S. Grziwa
(18)
,
Guillaume Hébrard
(19)
,
P. Klagyivik
(9)
,
Marc Ollivier
(20)
,
M. Pätzold
(18)
,
Heike Rauer
(1)
,
Daniel Rouan
(10, 11, 12)
,
A. Santerne
(21)
,
Jean Schneider
(22)
,
Tsevi Mazeh
(23)
,
Günther Wuchterl
(2)
,
Stefania Carpano
(24)
,
Aviv Ofir
(25)
1
Institute of Planetary Research, German Aerospace Center, Rutherfordstrasse 2, 12489, Berlin, Germany
2 Türinger Landessternwarte Tautenburg
3 UniGe - Università degli studi di Genova = University of Genoa
4 LAM - Laboratoire d'Astrophysique de Marseille
5 MPIA - Max-Planck-Institut für Astronomie
6 Konkoly Observatory of the Hungarian Academy of Sciences, MTA CSFK, Budapest, Konkoly Thege Miklos ut, 15-17, Hungary
7 Department of Physics
8 Department of Physics, Denys Wilkinson Building, Keble Road, Oxford, OX1 3RH, UK
9 IAC - Instituto de Astrofisica de Canarias
10 LESIA - Laboratoire d'études spatiales et d'instrumentation en astrophysique
11 Etoile
12 Haute résolution angulaire en astrophysique
13 LAB - Laboratoire d'Astrophysique de Bordeaux [Pessac]
14 INAF-Osservatorio Astrofisico di Torino Strada Osservatorio, 20 10025, Pino Torinese, TO, Italy
15 Observatoire astronomique de l'Universite de Geneve, 51 ch. des Maillettes, 1290, Versoix, Switzerland
16 IAG - Instituto Astronômico e Geofísico, Universidade de São Paulo
17 UNS - Université Nice Sophia Antipolis (1965 - 2019)
18 RIU - Rheinisches Institut für Umweltforschung
19 IAP - Institut d'Astrophysique de Paris
20 IAS - Institut d'astrophysique spatiale
21 Universidade do Porto = University of Porto
22 LUTH (UMR_8102) - Laboratoire Univers et Théories
23 TAU - Tel Aviv University
24 Max Planck Institut für Plasma Physik and Excellence Cluster
25 Department of Earth and Planetary Sciences [Rehovot]
2 Türinger Landessternwarte Tautenburg
3 UniGe - Università degli studi di Genova = University of Genoa
4 LAM - Laboratoire d'Astrophysique de Marseille
5 MPIA - Max-Planck-Institut für Astronomie
6 Konkoly Observatory of the Hungarian Academy of Sciences, MTA CSFK, Budapest, Konkoly Thege Miklos ut, 15-17, Hungary
7 Department of Physics
8 Department of Physics, Denys Wilkinson Building, Keble Road, Oxford, OX1 3RH, UK
9 IAC - Instituto de Astrofisica de Canarias
10 LESIA - Laboratoire d'études spatiales et d'instrumentation en astrophysique
11 Etoile
12 Haute résolution angulaire en astrophysique
13 LAB - Laboratoire d'Astrophysique de Bordeaux [Pessac]
14 INAF-Osservatorio Astrofisico di Torino Strada Osservatorio, 20 10025, Pino Torinese, TO, Italy
15 Observatoire astronomique de l'Universite de Geneve, 51 ch. des Maillettes, 1290, Versoix, Switzerland
16 IAG - Instituto Astronômico e Geofísico, Universidade de São Paulo
17 UNS - Université Nice Sophia Antipolis (1965 - 2019)
18 RIU - Rheinisches Institut für Umweltforschung
19 IAP - Institut d'Astrophysique de Paris
20 IAS - Institut d'astrophysique spatiale
21 Universidade do Porto = University of Porto
22 LUTH (UMR_8102) - Laboratoire Univers et Théories
23 TAU - Tel Aviv University
24 Max Planck Institut für Plasma Physik and Excellence Cluster
25 Department of Earth and Planetary Sciences [Rehovot]
François Bouchy
- Fonction : Auteur
- PersonId : 755523
- ORCID : 0000-0002-7613-393X
- IdRef : 069924120
J. M. Almenara
- Fonction : Auteur
- PersonId : 760392
- ORCID : 0000-0003-3208-9815
Résumé
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.
Domaines
Astrophysique [astro-ph]
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