Ground-based detection of thermal emission from the exoplanet WASP-19b - Astrophysics > Earth and Planetary AstrophysicsReport as inadecuate




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Abstract: We present an occultation of the newly discovered hot Jupiter system WASP-19,observed with the HAWK-I instrument on the VLT, in order to measure thermalemission from the planet-s dayside at ~2 um. The light curve was analysed usinga Markov-Chain Monte-Carlo method to find the eclipse depth and the centraltransit time. The transit depth was found to be 0.366+-0.072 %, correspondingto a brightness temperature of 2540+-180 K. This is significantly higher thanthe calculated zero-albedo equilibrium temperature, and indicates that theplanet shows poor redistribution of heat to the night side, consistent withmodels of highly irradiated planets. Further observations are needed to confirmthe existence of a temperature inversion, and possibly molecular emissionlines. The central eclipse time was found to be consistent with a circularorbit.



Author: N. P. Gibson 1,2 and 3, S. Aigrain 1 and 2, D. L. Pollacco 3, S. C. C. Barros 3, L. Hebb 4, M. Hrudkov√° 5, E. K. Simpson 3, I. S

Source: https://arxiv.org/







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