Bibcode
Alonso, R.; Moutou, C.; Endl, M.; Almenara, J.-M.; Guenther, E. W.; Deleuil, M.; Hatzes, A.; Aigrain, S.; Auvergne, M.; Baglin, A.; Barge, P.; Bonomo, A. S.; Bordé, P.; Bouchy, F.; Cavarroc, C.; Cabrera, J.; Carpano, S.; Csizmadia, Sz.; Cochran, W. D.; Deeg, H. J.; Díaz, R. F.; Dvorak, R.; Erikson, A.; Ferraz-Mello, S.; Fridlund, M.; Fruth, T.; Gandolfi, D.; Gillon, M.; Grziwa, S.; Guillot, T.; Hébrard, G.; Jorda, L.; Léger, A.; Lammer, H.; Lovis, C.; MacQueen, P. J.; Mazeh, T.; Ofir, A.; Ollivier, M.; Pasternacki, T.; Pätzold, M.; Queloz, D.; Rauer, H.; Rouan, D.; Santerne, A.; Schneider, J.; Tadeu dos Santos, M.; Tingley, B.; Titz-Weider, R.; Weingrill, J.; Wuchterl, G.
Referencia bibliográfica
Astronomy and Astrophysics, Volume 567, id.A112, 13 pp.
Advertised on:
7
2014
Revista
Número de citas
20
Número de citas referidas
19
Descripción
We present the discovery of a candidate multiply transiting system, the
first one found in the CoRoT mission. Two transit-like features with
periods of 5.11 and 11.76 d are detected in the CoRoT light curve around
a main sequence K1V star of r = 15.1. If the features are due to
transiting planets around the same star, these would correspond to
objects of 3.7 ± 0.4 and 5.0 ± 0.5 R⊕ ,
respectively. Several radial velocities serve to provide an upper limit
of 5.7 M⊕ for the 5.11 d signal and to tentatively
measure a mass of 28+11-11 M⊕ for
the object transiting with a 11.76 d period. These measurements imply
low density objects, with a significant gaseous envelope. The detailed
analysis of the photometric and spectroscopic data serves to estimate
the probability that the observations are caused by transiting
Neptune-sized planets as much as over 26 times higher than a blend
scenario involving only one transiting planet and as much as over 900
times higher than a scenario involving two blends and no planets. The
radial velocities show a long-term modulation that might be attributed
to a 1.5 MJup planet orbiting at 1.8 AU from the host, but
more data are required to determine the precise orbital parameters of
this companion.
The CoRoT space mission, launched on 27 December 2006, has been
developed and is operated by the CNES, with the contribution of Austria,
Belgium, Brazil, ESA (RSSD and Science Program), Germany, and Spain.
Some of the observations were made with the HARPS spectrograph at ESO La
Silla Observatory (184.C-0639) and with the HIRES spectrograph at the
Keck Telescope (N035Hr, N143Hr 260 and N095Hr). Partly based on
observations obtained at ESO Paranal Observatory, Chile (086.C-0235(A)
and B).Tables 2-4 and Fig. 12 are available in electronic form at http://www.aanda.org
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