Ultraviolet emissions in the planetary atmospheres.

Astronomy and Astrophysics – Astronomy

Scientific paper

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Scientific paper

Actual state and perspectives of the observations of the plan- etary atmospheres in the ultraviolet range of wavelengths are discussed. The main features of the planetary aeronomy for terrestrial planets, giant planets and exoplanets-transits are given. The following hot problems of the plane- tary astronomy in the UV wavelength range are discussed: (i) UV observations of hot coronas of the terrestrial planets; (ii) formation and morphology of the rarefied H2O-, O2 - and O-dominant atmospheres of the icy satellites in the gi- ant planet systems; (iii) formation and evolution of the neutral gas clouds in the giant planet systems; (iv) studies of the extended hydrogen coronae of the transit-exoplanets formed due to the stellar UV and plasma wind forcing. The mathematical models such as the Monte Carlo model for the electron, proton, and heavy-ion precipitation into the planetary atmospheres are also discussed. Such models are currently used to calculate the excitation rates of the atmo- spheric UV emissions and will be used for the interpretation of the expected UV observations of the planetary atmospheres with the space observatory World Space Observatory - Ultraviolet (WSO-UV) [1, 2].

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