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    Spacecraft Observations and Theoretical Understanding of Slow Electron Holes

    Sergey R. Kamaletdinov*

    Ian H. Hutchinson

    Ivan Y. Vasko

    Anton V. Artemyev

    Ajay Lotekar

    Forrest Mozer

    • Space Research Institute, Moscow 117997, Russia and Department of Physics, Moscow State University, Moscow 119234, Russia

    • Plasma Science and Fusion Center, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA

    • Space Sciences Laboratory, University of California at Berkeley, Berkeley, California 94720, USA and Space Research Institute of Russian Academy of Sciences, Moscow 117997, Russia

    • University of California, Los Angeles, Los Angeles, California 90095, USA and Space Research Institute of Russian Academy of Sciences, Moscow 117997, Russia

    • Swedish Institute of Space Physics, Uppsala 752 37, Sweden

    • Space Sciences Laboratory, University of California at Berkeley, Berkeley, California 94720, USA and Department of Physics, University of California at Berkeley, Berkeley, California 94720, USA

    • *Serjesmail@gmail.com
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    Phys. Rev. Lett. 127, 165101 – Published 15 October, 2021

    DOI: https://doi.org/10.1103/PhysRevLett.127.165101

    Abstract

    We present Magnetospheric Multiscale observations showing large numbers of slow electron holes with speeds clustered near the local minimum of double-humped velocity distribution functions of background ions. Theoretical computations show that slow electron holes can avoid the acceleration that otherwise prevents their remaining slow only under these same circumstances. Although the origin of the slow electron holes is still elusive, the agreement between observation and theory about the conditions for their existence is remarkable.

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    Phys. Rev. Lett. 127, 165101– Published 15 October, 2021
    • Received 8 May 2021
    • Revised 15 August 2021
    • Accepted 7 September 2021
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