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Effect of the solar wind on the nature of arbitrary amplitude ion-acoustic solitary waves in Venus' upper ionosphere

Fichtner, H.; Lazar, M.; El-Shafeay, N. A. +5 more

Observations suggest that at altitudes of 1000-2000 km the interaction between the solar wind and Venus' ionospheric plasma leads to ion-acoustic waves (IAWs) formation. For studying this hypothesis, a suitable hydrodynamic model relying on the observational data from Pioneer Venus Orbiter (PVO) and Venus Express (VEX) is developed. It consists of…

Lightning climatology of exoplanets and brown dwarfs guided by Solar system data

Helling, Ch.; Hodosán, G.; Asensio-Torres, R. +2 more

Clouds form on extrasolar planets and brown dwarfs where lightning could occur. Lightning is a tracer of atmospheric convection, cloud formation and ionization processes as known from the Solar system, and may be significant for the formation of prebiotic molecules. We study lightning climatology for the different atmospheric environments of Earth…