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Multisatellite Obse...
Multisatellite Observations of Ion Holes in the Earth's Plasma Sheet
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- Wang, R. (författare)
- Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA.
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- Vasko, I. Y. (författare)
- Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA.;Russian Acad Sci, Space Res Inst, Moscow, Russia.
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Artemyev, A. , V (författare)
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- Holley, L. C. (författare)
- Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA.;Univ Calif Davis, Davis, CA 95616 USA.
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- Kamaletdinov, S. R. (författare)
- Russian Acad Sci, Space Res Inst, Moscow, Russia.;Natl Res Univ Higher Sch Econ, Fac Phys, Moscow, Russia.
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- Lotekar, Ajay (författare)
- Uppsala universitet,Institutet för rymdfysik, Uppsalaavdelningen
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- Mozer, F. S. (författare)
- Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA.
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Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA.;Russian Acad Sci, Space Res Inst, Moscow, Russia. (creator_code:org_t)
- American Geophysical Union (AGU), 2022
- 2022
- Engelska.
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Ingår i: Geophysical Research Letters. - : American Geophysical Union (AGU). - 0094-8276 .- 1944-8007. ; 49:8
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- We present the first observations of electrostatic solitary waves with electrostatic potential of negative polarity around a fast plasma flow in the Earth's plasma sheet. The solitary waves are observed aboard four Magnetospheric Multiscale spacecraft, which allowed accurately estimating solitary wave properties. Based on a data set of 153 solitary waves, we show that they are locally one-dimensional Debye-scale structures with amplitudes up to 20% of local electron temperature and they propagate at plasma frame speeds ranging from a tenth to a few ion-acoustic speeds at arbitrary angles to the local magnetic field. The solitary waves are associated with multi-component proton distributions and their velocities are around those of a beam-like proton population. We argue that the solitary waves are ion holes, nonlinear structures produced by ion-streaming instabilities, and conclude that once ions are not magnetized, ion holes can propagate oblique to local magnetic field.
Ämnesord
- NATURVETENSKAP -- Fysik -- Fusion, plasma och rymdfysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Fusion, Plasma and Space Physics (hsv//eng)
Nyckelord
- plasma sheet
- solitary waves
- ion holes
- electrostatic instabilities
- ion beam instabilities
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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