globalchange  > 科学计划与规划
DOI: 10.1002/2016GL067853
论文题名:
Formation of energetic electron butterfly distributions by magnetosonic waves via Landau resonance
作者: Li J.; Ni B.; Ma Q.; Xie L.; Pu Z.; Fu S.; Thorne R.M.; Bortnik J.; Chen L.; Li W.; Baker D.N.; Kletzing C.A.; Kurth W.S.; Hospodarsky G.B.; Fennell J.F.; Reeves G.D.; Spence H.E.; Funsten H.O.; Summers D.
刊名: Geophysical Research Letters
ISSN: 0094-9123
EISSN: 1944-8854
出版年: 2016
卷: 43, 期:7
起始页码: 3009
结束页码: 3016
语种: 英语
英文关键词: butterfly distributions ; energetic electrons ; Landau resonance ; magnetosonic waves ; radiation belt
Scopus关键词: Electron scattering ; Geomagnetism ; Magnetosphere ; Radiation belts ; Butterfly distributions ; Energetic electron ; Landau resonance ; Magnetosonic waves ; Magnetospheric boundary ; Magnetospheric process ; Pitch angle distribution ; Radiation belt electrons ; Electrons
英文摘要: Radiation belt electrons can exhibit different types of pitch angle distributions in response to various magnetospheric processes. Butterfly distributions, characterized by flux minima at pitch angles around 90°, are broadly observed in both the outer and inner belts and the slot region. Butterfly distributions close to the outer magnetospheric boundary have been attributed to drift shell splitting and losses to the magnetopause. However, their occurrence in the inner belt and the slot region has hitherto not been resolved. By analyzing the particle and wave data collected by the Van Allen Probes during a geomagnetic storm, we combine test particle calculations and Fokker-Planck simulations to reveal that scattering by equatorial magnetosonic waves is a significant cause for the formation of energetic electron butterfly distributions in the inner magnetosphere. Another event shows that a large-amplitude magnetosonic wave in the outer belt can create electron butterfly distributions in just a few minutes. © 2016. American Geophysical Union. All Rights Reserved.
URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84979468598&doi=10.1002%2f2016GL067853&partnerID=40&md5=1d2db73281ab3f97d31e806e120dc303
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/10086
Appears in Collections:科学计划与规划
气候变化与战略

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作者单位: Institute of Space Physics and Applied Technology, Peking University, Beijing, China

Recommended Citation:
Li J.,Ni B.,Ma Q.,et al. Formation of energetic electron butterfly distributions by magnetosonic waves via Landau resonance[J]. Geophysical Research Letters,2016-01-01,43(7).
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