Kinetic study of ion acoustic waves in Venusian ionosphere

Kinetic dispersion of the ion acoustic waves has been explored for an unmagnetized five component plasma system comprising Venusian protons, oxygen ions, electrons, solar wind and kappa electrons. The protons electrons are assumed to be streaming along ambient magnetic field. parameters this study have obtained from Lundin et al. [Icarus 215(2), 751–758 (2011)] dawn dusk meridian Venus Express with data ASPERA-4 mass analyzer. Our analysis revealed that two modes, viz., mode beam driven mode, excited considered parameters. exists due its growth rate is influenced by mode's existence depend on protons. We conjecture could useful in explaining electrostatic noise ionosphere range several hundreds Hz 1 kHz tens kHz, respectively.