• Corpus ID: 248496189

Cloud formation in Exoplanetary Atmospheres

@inproceedings{Helling2022CloudFI,
  title={Cloud formation in Exoplanetary Atmospheres},
  author={Ch. Helling},
  year={2022}
}
This invited review for young researchers presents key ideas on cloud formation as key part for virtual laboratories for exoplanet atmospheres. The basic concepts are presented, followed by utilising a time-scale analysis to disentangle process hierarchies. The kinetic approach to cloud formation modelling is described in some detail to allow the discussion of cloud structures as prerequisite for future extrasolar weather forecasts. 
View PDF on arXiv

Figures from this paper

References

SHOWING 1-10 OF 45 REFERENCES
Unveiling cloudy exoplanets: the influence of cloud model choices on retrieval solutions
  • J. Barstow
  • Geology, Physics
    Monthly Notices of the Royal Astronomical Society
  • 2020
<p>A substantial fraction of transiting exoplanets have some form of aerosol present in their atmospheres. Transit spectroscopy, especially of hot Jupiters, has provided evidence for this, in the…
Mineral cloud and hydrocarbon haze particles in the atmosphere of the hot Jupiter JWST target WASP-43b
Context. Having a short orbital period and being tidally locked makes WASP-43b an ideal candidate for the James Webb Space Telescope (JWST) phase curve measurements. Phase curve observations of an…
Dust in brown dwarfs and extra-solar planets
The precipitation of cloud particles in brown dwarf and exoplanet atmospheres establishes an ongoing downward flux of condensable elements. To understand the efficiency of cloud formation, it is…
A comparison of chemistry and dust cloud formation in ultracool dwarf model atmospheres
The atmospheres of substellar objects contain clouds of oxides, iron, silicates and other refractory condensates. Water clouds are expected in the coolest objects. The opacity of these 'dust' clouds…
Grid of pseudo-2D chemistry models for tidally locked exoplanets – I. The role of vertical and horizontal mixing
The atmospheres of synchronously rotating exoplanets are intrinsically 3D, and fast vertical and horizontal winds are expected to mix the atmosphere, driving the chemical composition out of…
Modelling the formation of atmospheric dust in brown dwarfs and planetary atmospheres
  • C. Helling, Aleksejs Fomins
  • Physics, Geology
    Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences
  • 2013
TLDR
This paper discusses nucleation in the ultra-cool atmospheres of brown dwarfs and extrasolar giant planets whose chemical gas-phase composition differs largely from the terrestrial atmosphere and introduces diffusive replenishment of the upper atmosphere into the model equations.
Formation of Silicate and Titanium Clouds on Hot Jupiters
We present the first application of a bin-scheme microphysical and vertical transport model to determine the size distribution of titanium and silicate cloud particles in the atmospheres of hot…
Dust in brown dwarfs - IV. Dust formation and driven turbulence on mesoscopic scales
Dust formation in brown dwarf atmospheres is studied by utilising a model for driven turbulence in the mesoscopic scale regime. We apply a pseudo-spectral method where waves are created and…
Atmospheric circulation of brown dwarfs and directly imaged exoplanets driven by cloud radiative feedback: global and equatorial dynamics
  • X. Tan, A. Showman
  • Physics, Geology
    Monthly Notices of the Royal Astronomical Society
  • 2021
Brown dwarfs, planetary-mass objects and directly imaged giant planets exhibit significant observational evidence for active atmospheric circulation, raising critical questions about mechanisms…
Aurora: A Generalized Retrieval Framework for Exoplanetary Transmission Spectra
Atmospheric retrievals of exoplanetary transmission spectra provide important constraints on various properties, such as chemical abundances, cloud/haze properties, and characteristic temperatures,…
...
...