At Venus the interaction of the shocked solar wind and cold planetary ions takes place in the dayside mantle. The shocked solar wind is a warm, drifting Maxwellian plasma whereas the planetary plasma is cold; the plasma in the mantle is strongly magnetized. The coexistence of these two populations is unstable, and it leads to wave excitations that organize the energy and momentum exchange between the shocked solar wind and the plasma of planetary origin. The source of the free energy is the solar wind. The intensive wave activity seen in the 100 Hz channel of the wave instrument onboard the Pioneer-Venus Orbiter in the dayside mantle region of Venus can be identified as almost electrostatic VLF waves excited by the kinetic branch of the modified two-stream lower hybrid instability. The waves interact with the particles, and the planetary plasma is heated and accelerated outside the ionosphere, close to its upper boundary. This way solar wind scavenges the ionosphere, and planetary ions leave the planetary magnetosphere. A portion of the wave energy is capable of penetrating directly into the ionosphere and heating it.


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    Titel :

    The sheath/ionosphere boundary layer at Venus


    Beteiligte:
    Szego, K. (Autor:in) / Shapiro, V. D. (Autor:in) / Ride, S. K. (Autor:in) / Nagy, A. F. (Autor:in) / Shevchenko, V. I. (Autor:in)

    Erschienen in:

    Erscheinungsdatum :

    01.08.1995



    Medientyp :

    Sonstige


    Format :

    Keine Angabe


    Sprache :

    Englisch


    Schlagwörter :


    The Sheath-Ionosphere Boundary Layer at Venus

    Szegö, K. | Online Contents | 1995


    The Sheath/Ionosphere Boundary Layer at Venus

    Szegoe, K. / Shapiro, V. D. / Ride, S. K. et al. | British Library Conference Proceedings | 1995


    The Venus ionosphere

    Bauer, S. J. / Brace, L. M. / Taylor, H. A., Jr. et al. | NTRS | 1985


    The Venus ionosphere

    Bauer, S.J. / Brace, L.M. / Taylor, H.A. Jr et al. | Elsevier | 1985


    Venus ionosphere : major features

    Mahajan, K. K. / Oyama, K. I. | TIBKAT | 1999