TTVs analysis in Southern Stars: the case of WASP-28
arXiv:1410.5900 · doi:10.1093/mnras/stu2152
Abstract
We present 4 new transit observations of the exoplanet WASP-28b observed between August 2011 and October 2013. Employing another 11 transits available in the literature we compute new ephemeris and redetermine the physical parameters of the star and the exoplanet. Considering 3 yrs of observations, we find no periodic TTVs or long-term variations of the inclination of the orbit, i, or the depth of the transit, k, that could be attributable to the presence of another planetary mass-body in the system. We also study the relations between i and k with different factors that characterize the light-curves. The fits suggest a possible weak correlation between k with the red noise factor, β, and the photometric noise rate, PNR, and a weak anticorrelation between i and PNR, although more points are needed to confirm these trends. Finally, the kinematic study suggests that WASP-28 is a thin disk star.
7 figures, 7 tables. Accepted for publication in MNRAS
References in corpus (14)
- Achieving better than 1 minute accuracy in the Heliocentric and Barycentric Julian Dates
- DHP Framework: Digital Health Passports Using Blockchain -- Use case on international tourism during the COVID-19 pandemic
- The effect of red noise on planetary transit detection
- A new code for automatic determination of equivalent widths: Automatic Routine for line Equivalent widths in stellar Spectra (ARES)
- The Transit Light Curve Project. IX. Evidence for a Smaller Radius of the Exoplanet XO-3b
- Kepler constraints on planets near hot Jupiters
- Stellar Parameters and Metallicities of Stars Hosting Jovian and Neptunian Mass Planets: A Possible Dependence of Planetary Mass on Metallicity
- Homogeneous studies of transiting extrasolar planets. II. Physical properties
- A method for the direct determination of the surface gravities of transiting extrasolar planets
- A transit timing analysis of nine RISE light curves of the exoplanet system TrES-3
- Metallicities of Planet Hosting Stars: A Sample of Giants and Subgiants
- A photometric study of the hot exoplanet WASP-19b
- Detection of period variations in extrasolar transiting planet OGLE-TR-111b
- FUNDPAR: A Program for deriving Fundamental Parameters from Equivalent Widths