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The thermal emission of the exoplanet WASP-3b
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Rostron, J. W., Wheatley, Peter J., Anderson, D. R., Collier Cameron, A., Fortney, J. J., Harrington, J., Knutson, H. A. and Pollacco, Don (2014) The thermal emission of the exoplanet WASP-3b. Monthly Notices of the Royal Astronomical Society, Volume 441 (Number 4). pp. 3666-3678. doi:10.1093/mnras/stu814
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Official URL: http://dx.doi.org/10.1093/mnras/stu814
Abstract
We report the detection of thermal emission from the transiting hot Jupiter WASP-3b at 3.6, 4.5 and 8.0 μm using the Spitzer Space Telescope. We obtain planet-to-star flux ratios of 0.209+0.040−0.028, 0.282 ± 0.012 and 0.328+0.086−0.055 per cent at these wavelengths, respectively, implying infrared brightness temperatures of T3.6μm=2280+210−150K, T4.5 μm = 2400 ± 80 K and T8.0μm=2210+390−250K. We find that WASP-3b falls into an emerging class of highly irradiated planets whose measured temperatures suggest that the planets are dark and redistribute heat around the planet inefficiently. The latter is similarly concluded from 1D atmospheric model comparisons, which also favour the presence of an atmospheric temperature inversion. We compare the WASP-3 system to the proposed inversion–activity relation, finding that it hints at a more complex relation than a simple cut-off in activity implied by previous data. Using eclipse timings we also constrain e cos ω to be −0.0006+0.0010−0.0006, suggesting that the eccentricity of WASP-3b can only be large for a narrow range of ω.
| Item Type: | Journal Article | ||||||||||
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| Divisions: | Faculty of Science > Physics | ||||||||||
| Journal or Publication Title: | Monthly Notices of the Royal Astronomical Society | ||||||||||
| Publisher: | Oxford University Press | ||||||||||
| ISSN: | 0035-8711 | ||||||||||
| Official Date: | 2014 | ||||||||||
| Dates: |
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| Volume: | Volume 441 | ||||||||||
| Number: | Number 4 | ||||||||||
| Page Range: | pp. 3666-3678 | ||||||||||
| DOI: | 10.1093/mnras/stu814 | ||||||||||
| Status: | Peer Reviewed | ||||||||||
| Publication Status: | Published | ||||||||||
| Access rights to Published version: | Restricted or Subscription Access |
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