Bibcode
Tal-Or, L.; Santerne, A.; Mazeh, T.; Bouchy, F.; Moutou, C.; Alonso, R.; Gandolfi, D.; Aigrain, S.; Auvergne, M.; Barge, P.; Bonomo, A. S.; Bordé, P.; Deeg, H. J.; Ferraz-Mello, S.; Deleuil, M.; Dvorak, R.; Erikson, A.; Fridlund, M.; Gillon, M.; Guenther, E. W.; Guillot, T.; Hatzes, A.; Jorda, L.; Lammer, H.; Léger, A.; Llebaria, A.; Ollivier, M.; Pätzold, M.; Queloz, D.; Rauer, H.; Rouan, D.; Tsodikovich, Y.; Wuchterl, G.
Referencia bibliográfica
Astronomy and Astrophysics, Volume 534, id.A67
Advertised on:
10
2011
Revista
Número de citas
8
Número de citas referidas
6
Descripción
This paper presents the case of CoRoT LRa02_E2_0121, which was initially
classified as a Neptune-size transiting-planet candidate on a relatively
wide orbit of 36.3 days. Follow-up observations were performed with
UVES, Sandiford, SOPHIE, and HARPS. These observations revealed a faint
companion in the spectra. To find the true nature of the system we
derived the radial velocities of the faint companion using TODMOR - a
two-dimensional correlation technique, applied to the SOPHIE spectra.
Modeling the lightcurve with EBAS we discovered a secondary eclipse with
a depth of ~0.07%, indicating a diluted eclipsing binary. Combined MCMC
modeling of the lightcurve and the radial velocities suggested that
CoRoT LRa02_E2_0121 is a hierarchical triple system with an evolved
G-type primary and an A-type:F-type grazing eclipsing binary. Such
triple systems are difficult to discover.
Based on observations made with the 1.93-m telescope at Observatoire de
Haute-Provence (CNRS), France, the 3.6-m telescope at La Silla
Observatory (ESO), Chile (program 184.C-0639), the VLT at Paranal
Observatory (ESO), Chile (program 083.C-0690), and the 2.1-m Otto Struve
telescope at McDonald Observatory, Texas, USA.
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