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- W3105443709 startingPage "20180398" @default.
- W3105443709 abstract "The study of the composition of brown dwarf atmospheres helped to understand their formation and evolution. Similarly, the study of exoplanet atmospheres is expected to constrain their formation and evolutionary states. We use results from 3D simulations, kinetic cloud formation and kinetic ion-neutral chemistry to investigate ionisation processes which will affect their atmosphere chemistry: The dayside of super-hot Jupiters is dominated by atomic hydrogen, and not H$_2$O. Such planetary atmospheres exhibit a substantial degree of thermal ionisation and clouds only form on the nightside where lightning leaves chemical tracers (e.g. HCN) for possibly long enough to be detectable. External radiation may cause exoplanets to be enshrouded in a shell of highly ionised, H$_3^+$-forming gas and a weather-driven aurora may emerge. Brown dwarfs enable us to study the role of electron beams for the emergence of an extrasolar, weather-system driven aurora-like chemistry, and the effect of strong magnetic fields on cold atmospheric gases. Electron beams trigger the formation of H$_3^+$ in the upper atmosphere of a brown dwarf (e.g. LSR-J1835) which may react with it to form hydronium, H$_3$O$^+$, as a longer lived chemical tracer. Brown dwarfs and super-hot gas giants may be excellent candidates to search for H$_3$O$^+$ as an H$_3^+$ product." @default.
- W3105443709 created "2020-11-23" @default.
- W3105443709 creator A5053941612 @default.
- W3105443709 creator A5079936629 @default.
- W3105443709 date "2019-08-05" @default.
- W3105443709 modified "2023-10-16" @default.
- W3105443709 title "Lightning and charge processes in brown dwarf and exoplanet atmospheres" @default.
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- W3105443709 doi "https://doi.org/10.1098/rsta.2018.0398" @default.
- W3105443709 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/6710897" @default.
- W3105443709 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/31378171" @default.
- W3105443709 hasPublicationYear "2019" @default.
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