Understanding the atmospheric properties and chemical composition of the ultra-hot Jupiter HAT-P-7b

@article{Molaverdikhani2019UnderstandingTA,
  title={Understanding the atmospheric properties and chemical composition of the ultra-hot Jupiter HAT-P-7b},
  author={Karan Molaverdikhani and Ch. Helling and Ben W. P. Lew and Ryan J. MacDonald and Dominic Samra and Nicolas Iro and Peter Woitke and Vivien Parmentier},
  journal={Astronomy \& Astrophysics},
  year={2019}
}
Context. Ultra-hot Jupiters are the hottest exoplanets that have been discovered so far. They present a unique possibility to explore hot and cold chemistry on one object. The tidally locked ultra-hot Jupiter HAT-P-7b has a day-to-night temperature difference of ≃2500 K, confining cloud formation to the nightside and efficient ionisation to the dayside. Both have distinct observational signatures. Aims. We analyse plasma and magnetic processes in the atmosphere of the ultra-hot Jupiter HAT-P-7b… 

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References

SHOWING 1-10 OF 181 REFERENCES
The Atmospheric Circulation of Ultra-hot Jupiters
Recent observations of ultra-hot Jupiters with dayside temperatures in excess of 2500 K have found evidence for new physical processes at play in their atmospheres. In this work, we investigate the
Sparkling nights and very hot days on WASP-18b: the formation of clouds and the emergence of an ionosphere
Context. WASP-18b is an ultra-hot Jupiter with a temperature difference of up to 2500 K between day and night. Such giant planets begin to emerge as a planetary laboratory for understanding cloud
A temperature inversion with atomic iron in the ultra-hot dayside atmosphere of WASP-189b
Temperature inversion layers are predicted to be present in ultra-hot giant planet atmospheres. Although such inversion layers have recently been observed in several ultra-hot Jupiters, the chemical
Lightning and charge processes in brown dwarf and exoplanet atmospheres
TLDR
Brown dwarfs and super-hot gas giants may be excellent candidates to search for H3O+ as an H3+ product, and results from three-dimensional simulations, kinetic cloud formation and kinetic ion-neutral chemistry are used to investigate ionization processes that will affect their atmosphere chemistry.
3D mixing in hot Jupiters atmospheres. I. Application to the day/night cold trap in HD 209458b
Context. Hot Jupiters exhibit atmospheric temperatures ranging from hundreds to thousands of Kelvin. Because of their large daynight temperature differences, condensable species that are stable in
Atmospheric characterization of the ultra-hot Jupiter MASCARA-2b/KELT-20b
Ultra-hot Jupiters orbit very close to their host star and consequently receive strong irradiation, causing their atmospheric chemistry to be different from the common gas giants. Here, we have
Detection of Ionized Calcium in the Atmosphere of the Ultra-hot Jupiter KELT-9b
With a dayside temperature in excess of 4500 K, comparable to a mid-K-type star, KELT-9b is the hottest planet known. Its extreme temperature makes KELT-9b a particularly interesting test bed for
Climate of an ultra hot Jupiter
We present the analysis of a full-orbit, spectroscopic phase curve of the ultra hot Jupiter (UHJ) WASP-18b, obtained with the Wide Field Camera 3 aboard the Hubble Space Telescope. We measured the
Global Climate and Atmospheric Composition of the Ultra-hot Jupiter WASP-103b from HST and Spitzer Phase Curve Observations
We present thermal phase curve measurements for the hot Jupiter WASP-103b observed with Hubble/WFC3 and Spitzer/IRAC. The phase curves have large amplitudes and negligible hotspot offsets, indicative
SPECTROSCOPIC EVIDENCE FOR A TEMPERATURE INVERSION IN THE DAYSIDE ATMOSPHERE OF HOT JUPITER WASP-33b
We present observations of two occultations of the extrasolar planet WASP-33b using the Wide Field Camera 3 (WFC3) on the Hubble Space Telescope, which allow us to constrain the temperature structure
...
...