Multi-band characterization of the hot Jupiters: WASP-5b, WASP-44b and WASP-46b

Abstract

We have carried out a campaign to characterize the hot Jupiters WASP-5b, WASP-44b and WASP-46b using multiband photometry collected at the Observatório do Pico Dos Dias in Brazil. We have determined the planetary physical properties and new transit ephemerides for these systems. The new orbital parameters and physical properties of WASP-5b and WASP-44b are consistent with previous estimates. In the case of WASP-46b, there is some quota of disagreement between previous results. We provide a new determination of the radius of this planet and help clarify the previous differences. We also studied the transit time variations including our new measurements. No clear variation from a linear trend was found for the systems WASP-5b and WASP-44b. In the case of WASP-46b, we found evidence of deviations indicating the presence of a companion but statistical analysis of the existing times points to a signal due to the sampling rather than a new planet. Finally, we studied the fractional radius variation as a function of wavelength for these systems. The broad-band spectrums of WASP-5b and WASP-44b are mostly flat. In the case of WASP-46b we found a trend, but further measurements are necessary to confirm this finding.

Published in MNRAS

References in corpus (14)

• 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
• EXOFAST: A fast exoplanetary fitting suite in IDL
• The effect of red noise on planetary transit detection
• Origins of Eccentric Extrasolar Planets: Testing the Planet-Planet Scattering Model
• Homogeneous studies of transiting extrasolar planets. I. Light curve analyses
• Limb darkening and exoplanets: testing stellar model atmospheres and identifying biases in transit parameters
• Improved parameters for the transiting hot Jupiters WASP-4b and WASP-5b
• Homogeneous studies of transiting extrasolar planets. II. Physical properties
• Rayleigh scattering by H2 in the extrasolar planet HD209458b
• Tidal Dissipation and Obliquity Evolution in Hot Jupiter Systems
• WASP-5b: a dense, very-hot Jupiter transiting a 12th-mag Southern-hemisphere star
• Physical properties of the WASP-44 planetary system from simultaneous multi-colour photometry
• High-precision multi-band time-series photometry of exoplanets Qatar-1b and TrES-5b

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• Near infrared and optical emission of WASP-5 b