Direct observations of cross-scale wave-particle energy transfer in space plasmas

DOI Web Site 参考文献65件
  • Jing-Huan Li
    School of Earth and Space Sciences, Peking University, Beijing, China.
  • Xu-Zhi Zhou
    School of Earth and Space Sciences, Peking University, Beijing, China.
  • Zhi-Yang Liu
    Institut de Recherche en Astrophysique et Planetologie, CNES-CNRS, Universite Toulouse III, Paul Sabatier, Toulouse, France.
  • Shan Wang
    School of Earth and Space Sciences, Peking University, Beijing, China.
  • Yoshiharu Omura
    State Key Laboratory of Lunar and Planetary Sciences, Macau University of Science and Technology, Macau, China.
  • Li Li
    School of Earth and Space Sciences, Peking University, Beijing, China.
  • Chao Yue
    School of Earth and Space Sciences, Peking University, Beijing, China.
  • Qiu-Gang Zong
    School of Earth and Space Sciences, Peking University, Beijing, China.
  • Guan Le
    NASA Goddard Space Flight Center, Greenbelt, MD, USA.
  • Christopher T. Russell
    Institute of Geophysics and Planetary Physics, University of California, Los Angeles, CA, USA.
  • James L. Burch
    Southwest Research Institute, San Antonio, TX, USA.

書誌事項

公開日
2025-02-07
資源種別
journal article
DOI
  • 10.1126/sciadv.adr8227
公開者
American Association for the Advancement of Science (AAAS)

説明

<jats:p>The collisionless plasmas in space and astrophysical environments are intrinsically multiscale in nature, behaving as conducting fluids at macroscales and kinetically at microscales comparable to ion and/or electron gyroradii. A fundamental question in understanding the plasma dynamics is how energy is transported and dissipated across scales. Here, we present spacecraft measurements in the terrestrial foreshock, a region upstream of the bow shock where the solar wind population coexists with the reflected ions. In this region, the fluid-scale, ultralow-frequency waves resonate with the reflected ions to modify the velocity distributions, which in turn cause the growth of the ion-scale, magnetosonic-whistler waves. The latter waves then resonate with the electrons, and the accelerated electrons contribute to the excitation of electron-scale, high-frequency whistler waves. These observations demonstrate that the chain of wave-particle resonances is an efficient mechanism for cross-scale energy transfer, which could redistribute the kinetic energy and accelerate the particles upstream of the shocks.</jats:p>

収録刊行物

  • Science Advances

    Science Advances 11 (6), 2025-02-07

    American Association for the Advancement of Science (AAAS)

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