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Ren, Jie; Zong, Q. G.; Zhou, X. Z.; Spence, H. E.; Funsten, H. O.; Wygant, J. R.; Rankin, R.
Journal of geophysical research. Space physics, October 2019, Letnik: 124, Številka: 10Journal Article
Six years of Van Allen Probes data are used to investigate cold plasmaspheric electrons affected by ultralow‐frequency (ULF) waves in the inner magnetosphere (L<7) including spatial distributions, occurrence conditions, and resonant energy range. Events exhibit a global distribution within L= 4–7 but preferentially occur at L∼5.5–7 in the dayside, while there is higher occurrence rate in the duskside than dawnside. They can occur under different geomagnetic activities and solar wind velocities (VS), but the occurrence rates are increasing with larger AE, |SYMH|, and VS. These features are closely associated with the generation and propagation of ULF waves in Pc4 (45–150 s) and Pc5 (150–600 s) bands. Combined with electron observations from HOPE instrument, the resonant energies inferred from wave power indicate that cold electrons at ones to hundreds of electron volts can be affected by ULF waves. This study may shed new light on further investigations on the acceleration and transportation of cold plasmaspheric particles that would affect plasmaspheric material release to the Earth's magnetosphere and instabilities for exciting various waves. Key Points Interactions between ULF waves and cold electrons occur at L = 4–7 with dominant distributions in the dayside and a dawn‐dusk asymmetry The event occurrence rates are increasing with larger AE, |SYMH|, and solar wind velocity The resonant energy inferred from wave power and electron observations indicates that electrons at ones to hundreds of electron volts are affected by ULF waves
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Leto | Faktor vpliva | Izdaja | Kategorija | Razvrstitev | ||||
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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