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

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    • Keywords


      Two-stream instability; linear dispersion; solarwind; hydrodynamic model; Venus express; ASPERA- 4.

    • Abstract


      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 employthe 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 beenstudied 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.

    • Author Affiliations



      1. Department of Physics, Visva-Bharati University, Santiniketan, Bolpur 731 235, India
      2. Department of Physics, Ramakrishna Mission Residential College, Narendrapur, Kolkata 700 103, India
      3. Department of Physics, Indian Institute of Technology Madras, Chennai 600 036, India
      4. Department of Physics, Government General Degree College at Kushmandi, Dakshin Dinajpur 733 121, India
      5. Institute of Natural Sciences and Applied Technology, Kolkata 700 032, India
    • Dates

  • Pramana – Journal of Physics | News

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