Volume 558, October 2013
|Number of page(s)||5|
|Published online||25 October 2013|
SOPHIE velocimetry of Kepler transit candidates
Aix Marseille Université, CNRS, LAM (Laboratoire d’Astrophysique
de Marseille) UMR 7326, 13388
2 INAF – Osservatorio Astrofisico di Torino, via Osservatorio 20, 10025, Pino Torinese, Italy
3 Institut d’Astrophysique de Paris, UMR 7095 CNRS, Université Pierre & Marie Curie, 98bis boulevard Arago, 75014 Paris, France
4 Observatoire de Haute-Provence, CNRS/OAMP, 04870 Saint-Michel-l’Observatoire, France
5 Centro de Astrofísica, Universidade do Porto, Rua das Estrelas, 4150-762 Porto, Portugal
Received: 3 July 2013
Accepted: 23 August 2013
We report the discovery of a long-period brown-dwarf transiting companion of the solar-type star KOI-415. The transits were detected by the Kepler space telescope. We conducted Doppler measurements using the SOPHIE spectrograph at the Observatoire de Haute-Provence. The photometric and spectroscopic signals allow us to characterize a 62.14 ± 2.69 MJup brown-dwarf companion of an evolved 0.94 ± 0.06 M⊙ star in a highly eccentric orbit of P = 166.78805 ± 0.00022 days and e = 0.698 ± 0.002. The radius of KOI-415 b is 0.79-0.07+0.12RJup , a value that is compatible with theoretical predictions for a 10 Gyr, low-metallicity and non-irradiated object.
Key words: planetary systems / techniques: photometric / techniques: spectroscopic / techniques: radial velocities / stars: brown dwarfs / stars: individual: KIC6289650
Based on observations collected with the NASA Kepler satellite and with the SOPHIE spectrograph on the 1.93-m telescope at Observatoire de Haute-Provence (CNRS), France.
Table 1 is available in electronic form at http://www.aanda.org
© ESO, 2013
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