THOR

THOR explores the atmosphere of WASP-43b

Summary

In a recent publication, THOR helped unveiling the “dark-side” of WASP-43b ([view paper]). Running 3D simulations of cloudy atmospheres,  THOR produced multi-phase emission spectra that constrain a cloud deck to be confined to the nightside of the planet and have a finite cloud-top pressure. The produced spectra also suggests the possibility of enhanced carbon dioxide in the atmosphere of WASP-43b.

In the figure above, we show the emission spectra at different orbital phases (panels a to i). The primary transit occurs at orbital phase 0.0 and the secondary eclipse at 0.5 (panel e). The blue points are WFC3 data from Stevenson et al. (2014) and Spitzer data from Stevenson et al. (2017). The red points are from our re-analysis of the Spitzer data. The different solid lines correspond to atmospheric scenarios: black – without clouds; cyan – with clouds; magenta – with clouds and extra CO2; yellow – clouds in the night side shifted 20 degrees westwards; green – clouds with lower cloud top level (20 mbar instead of 10 mbar).

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