Distributions of ions heated in quasi-perpendicular bow shocks have large perpendicular temperature anisotropies that provide free energy for the growth of Alfven ion cyclotron (AIC) and mirror waves. These modes are often obsreved in the Earth's magnetosheath. Using two-dimensional hybrid simulations, we show that these waves are produced near the shock front and convected downstream rather than being produced locally downstream. The wave activity reduces the proton anisotropy to magnetosheath levels within a few tens of gyroradii of the shock but takes significantly longer to reduce the anisotropy of He(++) ions. The waves are primarily driven by proton anisotropy and the dynamics of the helium ions is controlled by the proton waves. Downstream of high Mach number shocks, mirror waves compete effectively with AIC waves. Downstream of low Mach number shocks, AIC waves dominate.


    Zugriff

    Zugriff über TIB

    Verfügbarkeit in meiner Bibliothek prüfen


    Exportieren, teilen und zitieren



    Titel :

    Wave and particle evolution downstream of quasi-perpendicular shocks


    Beteiligte:
    Mckean, M. E. (Autor:in) / Omidi, N. (Autor:in) / Krauss-Varban, D. (Autor:in) / Karimabadi, H. (Autor:in)

    Erschienen in:

    Erscheinungsdatum :

    1995-01-01



    Medientyp :

    Sonstige


    Format :

    Keine Angabe


    Sprache :

    Englisch


    Schlagwörter :



    Wave and Particle Evolution Downstream of Quasi-Perpendicular Shocks

    McKean, M. E. / Omidi, N. / Krauss-Varban, D. et al. | British Library Conference Proceedings | 1995


    Upstream Parameter Dependence of Anisotropies in the Ion Distributions Downstream of Quasi-Perpendicular Shocks

    Wilkinson, W. P. / Committee on Space Research; Scientific Commission D | British Library Conference Proceedings | 1995



    On reformation of quasi-perpendicular collisionless shocks

    Matsukiyo, Shuichi / Scholer, Manfred | Elsevier | 2004