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First Measurements ...
First Measurements of Electrons and Waves inside an Electrostatic Solitary Wave
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- Fu, H. S. (author)
- Beihang Univ, Sch Space & Environm, Beijing 100191, Peoples R China
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- Chen, F. (author)
- Beihang Univ, Sch Space & Environm, Beijing 100191, Peoples R China
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- Chen, Z. Z. (author)
- Beihang Univ, Sch Space & Environm, Beijing 100191, Peoples R China
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- Xu, Y. (author)
- Beihang Univ, Sch Space & Environm, Beijing 100191, Peoples R China
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- Wang, Z. (author)
- Beihang Univ, Sch Space & Environm, Beijing 100191, Peoples R China
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- Liu, Y. Y. (author)
- Beihang Univ, Sch Space & Environm, Beijing 100191, Peoples R China
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- Liu, C. M. (author)
- Beihang Univ, Sch Space & Environm, Beijing 100191, Peoples R China
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- Khotyaintsev, Yuri V. (author)
- Uppsala universitet,Institutet för rymdfysik, Uppsalaavdelningen
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- Ergun, R. E. (author)
- Univ Colorado, Dept Astrophys & Planetary Sci, Boulder, CO 80303 USA
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- Giles, B. L. (author)
- NASA, Goddard Space Flight Ctr, Code 916, Greenbelt, MD 20771 USA
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- Burch, J. L. (author)
- Southwest Res Inst, San Antonio, TX 78228 USA
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(creator_code:org_t)
- AMER PHYSICAL SOC, 2020
- 2020
- English.
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In: Physical Review Letters. - : AMER PHYSICAL SOC. - 0031-9007 .- 1079-7114. ; 124:9
- Related links:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
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- Electrostatic solitary wave (ESW)-a Debye-scale structure in space plasmas-was believed to accelerate electrons. However, such a belief is still unverified in spacecraft observations, because the ESW usually moves fast in spacecraft frame and its interior has never been directly explored. Here, we report the first measurements of an ESW's interior, by the Magnetospheric Multiscale mission located in a magnetotail reconnection jet. We find that this ESW has a parallel scale of 5 lambda(De) (Debye length), a superslow speed (99 km/s) in spacecraft frame, a longtime duration (250 ms), and a potential drop e phi(0)/kT(e) similar to 5%. Inside the ESW, surprisingly, there is no electron acceleration, no clear change of electron distribution functions, but there exist strong electrostatic electron cyclotron waves. Our observations challenge the conventional belief that ESWs are efficient at particle acceleration.
Subject headings
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Publication and Content Type
- ref (subject category)
- art (subject category)
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- By the author/editor
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Fu, H. S.
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Chen, F.
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Chen, Z. Z.
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Xu, Y.
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Wang, Z.
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Liu, Y. Y.
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Liu, C. M.
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Khotyaintsev, Yu ...
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Ergun, R. E.
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Giles, B. L.
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Burch, J. L.
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- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Astronomy Astrop ...
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Physical Review ...
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Uppsala University