TASTE. III. A homogeneous study of transit time variations in WASP-3b

Abstract

The TASTE project is searching for low-mass planets with the Transit Timing Variation (TTV) technique, by gathering high-precision, short-cadence light curves for a selected sample of transiting exoplanets. It has been claimed that the "hot Jupiter" WASP-3b could be perturbed by a second planet. Presenting eleven new light curves (secured at the IAC80 and UDEM telescopes) and re-analyzing thirty-eight archival light curves in a homogeneous way, we show that new data do not confirm the previously claimed TTV signal. However, we bring evidence that measurements are not consistent with a constant orbital period, though no significant periodicity can be detected. Additional dynamical modeling and follow-up observations are planned to constrain the properties of the perturber or to put upper limits to it. We provide a refined ephemeris for WASP-3b and improved orbital/physical parameters. A contact eclipsing binary, serendipitously discovered among field stars, is reported here for the first time.

10 pages, 6 figures, 4 tables; accepted for publication in A&A

References in corpus (16)

• The generalised Lomb-Scargle periodogram. A new formalism for the floating-mean and Keplerian periodograms
• 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
• Homogeneous studies of transiting extrasolar planets. I. Light curve analyses
• The Transit Light Curve Project. IX. Evidence for a Smaller Radius of the Exoplanet XO-3b
• WASP-3b: a strongly-irradiated transiting gas-giant planet
• The Transit Light Curve Project. V. System Parameters and Stellar Rotation Period of HD 189733
• Deep MMT Transit Survey of the Open Cluster M37 II: Variable Stars
• A transit timing analysis of nine RISE light curves of the exoplanet system TrES-3
• Updated parameters for the transiting exoplanet WASP-3b using RISE, a new fast camera for the Liverpool Telescope
• The DWARF project: Eclipsing binaries - precise clocks to discover exoplanets
• A Prograde, Low-Inclination Orbit for the Very Hot Jupiter WASP-3b
• A Fast Chi-squared Technique For Period Search of Irregularly Sampled Data
• TASTE: The Asiago Search for Transit timing variations of Exoplanets. I. Overview and improved parameters for HAT-P-3b and HAT-P-14b
• An Analysis of Jitter and Transit Timing Variations in the HAT-P-13 System

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