2015A&A...573A.124B


C.D.S. - SIMBAD4 rel 1.7 - 2019.10.16CEST03:11:02

2015A&A...573A.124B - Astronomy and Astrophysics, volume 573A, 124-124 (2015/1-1)

SOPHIE velocimetry of Kepler transit candidates. XIV. A joint photometric, spectroscopic, and dynamical analysis of the Kepler-117 system.

BRUNO G., ALMENARA J.-M., BARROS S.C.C., SANTERNE A., DIAZ R.F., DELEUIL M., DAMIANI C., BONOMO A.S., BOISSE I., BOUCHY F., HEBRARD G. and MONTAGNIER G.

Abstract (from CDS):

As part of our follow-up campaign of Kepler planets, we observed Kepler-117 with the SOPHIE spectrograph at the Observatoire de Haute-Provence. This F8-type star hosts two transiting planets in non-resonant orbits. The planets, Kepler-117 b and c, have orbital periods ≃18.8 and ≃50.8-days, and show transit-timing variations (TTVs) of several minutes. We performed a combined Markov chain Monte Carlo (MCMC) fit on transits, radial velocities, and stellar parameters to constrain the characteristics of the system. We included the fit of the TTVs in the MCMC by modeling them with dynamical simulations. In this way, consistent posterior distributions were drawn for the system parameters. According to our analysis, planets b and c have notably different masses (0.094±0.033 and 1.84±0.18MJ) and low orbital eccentricities (0.0493±0.0062 and 0.0323±0.0033). The uncertainties on the derived parameters are strongly reduced if the fit of the TTVs is included in the combined MCMC. The TTVs allow measuring the mass of planet b although its radial velocity amplitude is poorly constrained. Finally, we checked that the best solution is dynamically stable.

Abstract Copyright:

Journal keyword(s): planetary systems - stars: individual: Kepler-117 - techniques: photometric - techniques: radial velocities - techniques: spectroscopic - methods: statistical

VizieR on-line data: <Available at CDS (J/A+A/573/A124): tablea1.dat KOI-209_TTVb.pdf tablea2.dat KOI-209_TTVc.pdf>

Simbad objects: 4

goto Full paper

goto View the reference in ADS

Number of rows : 4

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2019
#notes
1 KOI-209 Ro* 19 15 10.3301781744 +48 02 24.785356330   14.93 14.29 14.58 13.69 ~ 51 4
2 KOI-209.01 Pl 19 15 10.3301781744 +48 02 24.785356330           ~ 28 0
3 KOI-209.02 Pl 19 15 10.3301781744 +48 02 24.785356330           ~ 22 0
4 * sig Dra PM* 19 32 21.5902990 +69 39 40.234737 5.860 5.460 4.680 4.04 3.63 K0V 570 0

    Equat.    Gal    SGal    Ecl

To bookmark this query, right click on this link: simbad:objects in 2015A&A...573A.124B and select 'bookmark this link' or equivalent in the popup menu


2019.10.16-03:11:02

© Université de Strasbourg/CNRS

    • Contact