Cold Plasmaspheric Electrons Affected by ULF Waves in the Inner Magnetosphere: A Van Allen Probes Statistical Study

Jie Ren, Q. G. Zong, X. Z. Zhou, H. E. Spence, H. O. Funsten, J. R. Wygant, R. Rankin

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

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.

Original languageEnglish (US)
Pages (from-to)7954-7965
Number of pages12
JournalJournal of Geophysical Research: Space Physics
Volume124
Issue number10
DOIs
StatePublished - Oct 1 2019

Bibliographical note

Funding Information:
This work was supported by the National Postdoctoral Program for Innovative Talents (BX20180002), China Postdoctoral Science Foundation, and National Natural Science Foundation of China (41904145, 41421003, and 41627805). We acknowledge use of Van Allen Probes data under NASAs Prime Contract NAS5‐01072, including HOPE data from the RBSP/ECT website ( https://www.rbsp-ect.lanl.gov/science/DataDirectories.php ), magnetic field data from the RBSP/EMFISIS website ( http://emfisis.physics.uiowa.edu/data/index ), and electric field data from the RBSP/EFW website ( http://www.space.umn.edu/rbspefw-data/ . The OMNI data are available at CDAWeb ( http://omniweb.gsfc.nasa.gov ).

Funding Information:
This work was supported by the National Postdoctoral Program for Innovative Talents (BX20180002), China Postdoctoral Science Foundation, and National Natural Science Foundation of China (41904145, 41421003, and 41627805). We acknowledge use of Van Allen Probes data under NASAs Prime Contract NAS5-01072, including HOPE data from the RBSP/ECT website (https://www.rbsp-ect.lanl.gov/science/DataDirectories.php), magnetic field data from the RBSP/EMFISIS website (http://emfisis.physics.uiowa.edu/data/index), and electric field data from the RBSP/EFW website (http://www.space.umn.edu/rbspefw-data/. The OMNI data are available at CDAWeb (http://omniweb.gsfc.nasa.gov).

Keywords

  • ULF waves
  • cold plasmaspheric electrons
  • drift-bounce resonance
  • wave-particle interaction

Fingerprint

Dive into the research topics of 'Cold Plasmaspheric Electrons Affected by ULF Waves in the Inner Magnetosphere: A Van Allen Probes Statistical Study'. Together they form a unique fingerprint.

Cite this