Journal
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Volume 517, Issue 1, Pages 240-256Publisher
OXFORD UNIV PRESS
DOI: 10.1093/mnras/stac2246
Keywords
radiative transfer; planets and satellites: atmospheres; planets and satellites: individual: WASP-121b; planets and satellites: individual: WASP-189b
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Funding
- SNSF Ambizione Fellowship [193448]
- Marta and Eric Holmberg Endowment
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The atmospheres of ultra hot Jupiters are important targets for the detection of molecules and atoms. By using GCM models with high temperature correlated-k opacity schemes, the thermal properties of the atmospheres can be studied, with the inclusion of UV opacities greatly shaping the high-altitude regions of the atmospheres.
The atmospheres of ultra hot Jupiters (UHJs) are prime targets for the detection of molecules and atoms at both low and high spectral resolution. We study the atmospheres of the UHJs WASP-121b and WASP-189b by performing 3D general circulation models (GCMs) of these planets using high temperature correlated-k opacity schemes with ultra-violet (UV) absorbing species included. The GCM results are then post-processed at low and high spectral resolutions and compared to available data. The high resolution results are cross-correlated with molecular and atomic templates to produce mock molecular detections. Our GCM models produce similar temperature-pressure (T-p) structure trends to previous 1D radiative-convective equilibrium models of UHJs. Furthermore, the inclusion of UV opacities greatly shapes the thermal and dynamical properties of the high-altitude, low-pressure regions of the UHJ atmospheres, with sharp T-p inversions due to the absorption of UV light. This suggests that optical wavelength, high-resolution observations probe a dynamically distinct upper atmospheric region, rather than the deeper jet forming layers.
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