Two-stream plasma instability as a potential mechanism for particle escape from the Venusian ionosphere

被引：0
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作者：
S Dey
S Ghosh
D Maity
A De
S Chandra
机构：
[1] Visva-Bharati University,Department of Physics
[2] Ramakrishna Mission Residential College,Department of Physics
[3] Indian Institute of Technology Madras,Department of Physics
[4] Government General Degree College at Kushmandi,Department of Physics
[5] Institute of Natural Sciences and Applied Technology,undefined
来源：
Pramana | / 96卷
关键词：
Two-stream instability; linear dispersion; solar wind; hydrodynamic model; Venus express; ASPERA-4; 96.30.Ea; 94.20.wh; 52.35.Qz; 11.55.Fv; 52.25.Jm;
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摘要：
In this work, we investigate the possibility of two-stream instability in the Venusian atmosphere leading to momentum transfer, then to the subsequent escape of hydrogen and oxygen ions from the ionosphere. We employ the hydrodynamic model and obtain the linear dispersion relation from which the two-stream instability is studied. Further, the interaction of solar wind with the ions of Venus ionosphere from which the instability sets in, has been studied using the data from ASPERA-4 of Venus express. The data support the fact that the two-stream instability can provide sufficient energy to accelerate ions to escape velocity of the planet and thus leave the Venusian ionosphere.
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