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.

eclipses

stars: rotation

brown dwarfs

Författare

S. Csizmadia

Deutsches Zentrums für Luft- und Raumfahrt (DLR)

A. Hatzes

D. Gandolfi

Universita degli Studi di Torino

Universität Heidelberg

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

Instituto Astrofisico de Canarias

Universidad de la Laguna

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, Rome

H. J. Deeg

Instituto Astrofisico de Canarias

Universidad de la Laguna

R. F. Diaz

Universite de Geneve

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 Astrofisico 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-institutet

A. Ofir

Weizmann Institute of Science

Astronomy and Astrophysics

0004-6361 (ISSN) 1432-0746 (eISSN)

Vol. 584 A13

Infrastruktur

Onsala rymdobservatorium

Ämneskategorier

Fusion, plasma och rymdfysik

DOI

10.1051/0004-6361/201526763