Drift‐Bounce Resonance Between Pc5 Pulsations and Ions at Multiple Energies in the Nightside Magnetosphere: Arase and MMS Observations

  • S. Oimatsu
    Graduate School of Science Kyoto University Kyoto Japan
  • M. Nosé
    Graduate School of Science Kyoto University Kyoto Japan
  • M. Teramoto
    Institute for Space‐Earth Environmental Research Nagoya University Nagoya Japan
  • K. Yamamoto
    Graduate School of Science Kyoto University Kyoto Japan
  • A. Matsuoka
    Institute of Space and Astronautical Science Japan Aerospace Exploration Agency Tokyo Japan
  • S. Kasahara
    Graduate School of Science The University of Tokyo Tokyo Japan
  • S. Yokota
    Graduate School of Science Osaka University Suita Japan
  • K. Keika
    Graduate School of Science The University of Tokyo Tokyo Japan
  • G. Le
    Heliophysics Science Division NASA Goddard Space Flight Center Greenbelt MD USA
  • R. Nomura
    Environmental Test Technology Unit Japan Aerospace Exploration Agency Tokyo Japan
  • A. Fujimoto
    International Center for Space Weather Science and Education Kyusyu University Fukuoka Japan
  • D. Sormakov
    Arctic and Antarctic Research Institute St. Petersburg Russia
  • O. Troshichev
    Arctic and Antarctic Research Institute St. Petersburg Russia
  • Y.‐M. Tanaka
    National Institute of Polar Research Tokyo Japan
  • M. Shinohara
    National Institute of Technology Kagoshima College Kagoshima Japan
  • I. Shinohara
    Institute of Space and Astronautical Science Japan Aerospace Exploration Agency Tokyo Japan
  • Y. Miyoshi
    Institute for Space‐Earth Environmental Research Nagoya University Nagoya Japan
  • J. A. Slavin
    Department of Climate and Space Sciences and Engineering University of Michigan Ann Arbor MI USA
  • R. E. Ergun
    Department of Astrophysical and Planetary Sciences University of Colorado Denver CO USA
  • P.‐A. Lindqvist
    Royal Institute of Technology Stockholm Sweden

書誌事項

公開日
2018-08-03
資源種別
journal article
権利情報
  • http://onlinelibrary.wiley.com/termsAndConditions#vor
DOI
  • 10.1029/2018gl078961
公開者
American Geophysical Union (AGU)

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説明

<jats:title>Abstract</jats:title><jats:p>A Pc5 wave is observed by the Exploration of energization and Radiation in Geospace Arase satellite in the inner magnetosphere (<jats:italic>L</jats:italic> ~5.4–6.1) near postmidnight (<jats:italic>L</jats:italic>‐magnetic local time ~1.8–2.5 hr) during the storm recovery phase on 27 March 2017. Its azimuthal wave number (<jats:italic>m</jats:italic>‐number) is estimated using two independent methods with satellites and ground observations to be −8 to −15. The direct measurement of the <jats:italic>m</jats:italic>‐number enables us to calculate the resonance energy. The flux oscillations of H<jats:sup>+</jats:sup> and O<jats:sup>+</jats:sup> ions at ≥ 56.3 keV are caused by drift resonance and those of O<jats:sup>+</jats:sup> ions at ≤ 18.6 keV by bounce resonance. Resonances of O<jats:sup>+</jats:sup> ions at multiple energies are simultaneously observed for the first time. The enhancement of the O<jats:sup>+</jats:sup>/H<jats:sup>+</jats:sup> flux ratio at ≤ 18.6 keV indicates selective acceleration of O<jats:sup>+</jats:sup> ions through bounce resonance.</jats:p>

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