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

Abstract : 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.
Type de document :
Article dans une revue
Astronomy and Astrophysics - A&A, EDP Sciences, 2015, 584, pp.A131. 〈10.1051/0004-6361/201526763〉
Liste complète des métadonnées

https://hal.archives-ouvertes.fr/hal-01192851
Contributeur : Marie-Paule Pomies <>
Soumis le : jeudi 3 septembre 2015 - 16:36:56
Dernière modification le : mardi 11 octobre 2016 - 15:01:39

Identifiants

Collections

L3AB | OBSPM | LESIA | UPMC | INSU | PSL | USPC

Citation

Sz., Csizmadia, A., Hatzes, D., Gandolfi, M., Deleuil, F., Bouchy, et al.. 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. Astronomy and Astrophysics - A&A, EDP Sciences, 2015, 584, pp.A131. 〈10.1051/0004-6361/201526763〉. 〈hal-01192851〉

Partager

Métriques

Consultations de la notice

130