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ULF Wave-Induced Io...
ULF Wave-Induced Ion Pitch Angle Evolution in the Dayside Outer Magnetosphere
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- Li, Xing-Yu (författare)
- Peking Univ, Inst Space Phys & Appl Technol, Beijing, Peoples R China.
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- Liu, Zhi-Yang (författare)
- Peking Univ, Inst Space Phys & Appl Technol, Beijing, Peoples R China.
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- Zong, Qiu-Gang (författare)
- Peking Univ, Inst Space Phys & Appl Technol, Beijing, Peoples R China.
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- Liu, Jian-Jun (författare)
- Polar Res Inst China, Shanghai, Peoples R China.
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- Fu, Sui-Yan (författare)
- Peking Univ, Inst Space Phys & Appl Technol, Beijing, Peoples R China.
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- Zhou, Xu-Zhi (författare)
- Peking Univ, Inst Space Phys & Appl Technol, Beijing, Peoples R China.
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- Hao, Yi-Xin (författare)
- Helmholtz Ctr Potsdam, GFZ German Res Ctr Geosci, Potsdam, Germany.
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- Pollock, Craig J. (författare)
- Denali Sci, Fairbanks, AK USA.
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- Russell, Christopher T. (författare)
- Univ Calif Los Angeles, Dept Earth & Space Sci, Los Angeles, CA 90024 USA.
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- Ergun, Robert E. (författare)
- Univ Colorado, Dept Astrophys & Planetary Sci, Boulder, CO 80309 USA.
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- Lindqvist, Per-Arne (författare)
- KTH,Rymd- och plasmafysik
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Peking Univ, Inst Space Phys & Appl Technol, Beijing, Peoples R China Polar Res Inst China, Shanghai, Peoples R China. (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
- Drift-bounce resonance between ultralow frequency (ULF) waves and ions is essential for ion energization in the magnetosphere. Here, we present the first comprehensive study of drift-bounce resonance in the dayside outer magnetosphere, where off-equatorial magnetic field minima would strongly distort ions' bounce and drift motion. A generalized theory is proposed, in which the effects of off-equatorial minima, time-evolving fields and ion bounce motion are taken into account. In consequence of these effects, ion pitch angle distributions undergo dramatic changes. In the presence of off-equatorial minima, the time-of-flight effect of ion bounce motion forms latitude-dependent dispersions besides "paw-track shaped" structures, while evolving wave fields cause time-dependent phase shifts in "paw-tracks." All the predicted signatures have been confirmed by 5 years of Magnetospheric Multiscale spacecraft data and numerical simulations. These results allow us to better understand the interactions between ULF waves and thermal ion species in global magnetospheric dynamics.
Ämnesord
- NATURVETENSKAP -- Fysik -- Fusion, plasma och rymdfysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Fusion, Plasma and Space Physics (hsv//eng)
Nyckelord
- ultralow frequency wave
- wave-particle interaction
- outer magnetosphere
- particle acceleration
- drift-bounce resonance
- dayside magnetosphere
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Li, Xing-Yu
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Liu, Zhi-Yang
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Zong, Qiu-Gang
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Liu, Jian-Jun
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Fu, Sui-Yan
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Zhou, Xu-Zhi
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visa fler...
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Hao, Yi-Xin
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Pollock, Craig J ...
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Russell, Christo ...
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Ergun, Robert E.
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Lindqvist, Per-A ...
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visa färre...
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