Csizmadia, Sz.; Hatzes, A.; Gandolfi, D.; Deleuil, M.; Bouchy, F.; Fridlund, M.; Szabados, L.; Parviainen, H.; Cabrera, J.; Aigrain, S.; Alonso, R.; Almenara, J.-M.; Baglin, A.; Bordé, P.; Bonomo, A. S.; Deeg, H. J.; Díaz, R. F.; Erikson, A.; Ferraz-Mello, S.; Tadeu dos Santos, M.; Guenther, E. W.; Guillot, T.; Grziwa, S.; Hébrard, G.; Klagyivik, P.; Ollivier, M.; Pätzold, M.; Rauer, H.; Rouan, D.; Santerne, A.; Schneider, J.; Mazeh, T.; Wuchterl, G.; Carpano, S.; Ofir, A.
Bibliographical reference
Astronomy and Astrophysics, Volume 584, id.A13, 12 pp.
Description
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.
The CoRoT space mission, launched on December 27th 2006, has been
developed and is operated by CNES, with the contribution of Austria,
Belgium, Brazil, ESA (RSSD and Science Programme), Germany and Spain.
Based on observations made with HARPS (High Accuracy Radial velocity
Planet Searcher) spectrograph on the 3.6-m European Organisation for
Astronomical Research in the Southern Hemisphere telescope at La Silla
Observatory, Chile (ESO program 188.C-0779).Based on observations
obtained with the Nordic Optical Telescope, operated on the island of La
Palma jointly by Denmark, Finland, Iceland, Norway, and Sweden, in the
Spanish Observatorio del Roque de los Muchachos of the Instituto de
Astrofisica de Canarias, in time allocated by the Spanish Time
Allocation Committee (CAT).
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The principal objectives of this project are: 1) to study the structure and dynamics of the solar interior, 2) to extend this study to other stars, 3) to search for extrasolar planets using photometric methods (primarily by transits of their host stars) and their characterization (using radial velocity information) and 4) the study of the planetary
Exoplanets and Astrobiology
The search for life in the universe has been driven by recent discoveries of planets around other stars (known as exoplanets), becoming one of the most active fields in modern astrophysics. The growing number of new exoplanets discovered in recent years and the recent advance on the study of their atmospheres are not only providing new valuable
