Ground-based detection of thermal emission from the exoplanet WASP-19b

N. P. Gibson; S. Aigrain; D. L. Pollacco; S. C. C. Barros; L. Hebb; M. Hrudková; E. K. Simpson; I. Skillen; R. West

doi:10.1111/j.1745-3933.2010.00847.x

Ground-based detection of thermal emission from the exoplanet WASP-19b

Earth and Planetary Astrophysics 2015-05-18 v2

Authors: N. P. Gibson , S. Aigrain , D. L. Pollacco , S. C. C. Barros , L. Hebb , M. Hrudková , E. K. Simpson , I. Skillen , R. West

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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 thermal emission from the planet's dayside at ~2 um. The light curve was analysed using a Markov-Chain Monte-Carlo method to find the eclipse depth and the central transit time. The transit depth was found to be 0.366+-0.072 %, corresponding to a brightness temperature of 2540+-180 K. This is significantly higher than the calculated (zero-albedo) equilibrium temperature, and indicates that the planet shows poor redistribution of heat to the night side, consistent with models of highly irradiated planets. Further observations are needed to confirm the existence of a temperature inversion, and possibly molecular emission lines. The central eclipse time was found to be consistent with a circular orbit.

Keywords

exoplanet hot Jupiter thermal emission occultation WASP-19b brightness temperature heat redistribution

Cite

@article{arxiv.1002.1996,
  title  = {Ground-based detection of thermal emission from the exoplanet WASP-19b},
  author = {N. P. Gibson and S. Aigrain and D. L. Pollacco and S. C. C. Barros and L. Hebb and M. Hrudková and E. K. Simpson and I. Skillen and R. West},
  journal= {arXiv preprint arXiv:1002.1996},
  year   = {2015}
}

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4 Figures, 1 Table, letter, accepted in MNRAS

Ground-based detection of thermal emission from the exoplanet WASP-19b

Abstract

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