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

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 (V_S), but the occurrence rates are increasing with larger AE, |SYMH|, and V_S. 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. Finally, 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.

Authors:

Ren, Jie  ^[1];

• Search DOE PAGES for author "Ren, Jie"
• Search DOE PAGES for ORCID "0000-0002-8043-206X"

Zong, Q. G.  ^[1];

• Search DOE PAGES for author "Zong, Q. G."
• Search DOE PAGES for ORCID "0000-0002-6414-3794"

Zhou, X. Z.  ^[1];

• Search DOE PAGES for author "Zhou, X. Z."
• Search DOE PAGES for ORCID "0000-0003-4953-1761"

Spence, H. E.  ^[2];

• Search DOE PAGES for author "Spence, H. E."
• Search DOE PAGES for ORCID "0000-0002-2526-2205"

Funsten, H. O.  ^[3];

• Search DOE PAGES for author "Funsten, H. O."
• Search DOE PAGES for ORCID "0000-0002-6817-1039"

Wygant, J. R.  ^[4];

• Search DOE PAGES for author "Wygant, J. R."
• Search DOE PAGES for ORCID "0000-0002-0564-0440"

Rankin, R.  ^[5]

• Search DOE PAGES for author "Rankin, R."
• Search DOE PAGES for ORCID "0000-0003-0151-6343"

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+ Show Author Affiliations

1. Peking Univ., Beijing (China)
2. Univ. of New Hampshire, Durham, NH (United States)
3. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
4. Univ. of Minnesota, Minneapolis, MN (United States)
5. Univ. of Alberta, Edmonton, AB (Canada)

Publication Date:

Wed Oct 23 00:00:00 EDT 2019

Research Org.:

Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)

Sponsoring Org.:

USDOE; National Aeronautics and Space Administration (NASA); National Postdoctoral Program for Innovative Talents; China Postdoctoral Science Foundation; National Natural Science Foundation of China (NSFC)

OSTI Identifier:

1818105

Report Number(s):

LA-UR-20-20738
Journal ID: ISSN 2169-9380; TRN: US2213917

Grant/Contract Number:  

89233218CNA000001; BX20180002; 41904145; 41421003; 41627805; NAS5-01072

Resource Type:

Accepted Manuscript

Journal Name:

Journal of Geophysical Research. Space Physics

Additional Journal Information:

Journal Volume: 124; Journal Issue: 10; Journal ID: ISSN 2169-9380

Publisher:

American Geophysical Union

Country of Publication:

United States

Language:

English

Subject:

79 ASTRONOMY AND ASTROPHYSICS; cold plasmaspheric electrons; ULF waves; wave-particle interaction; drift-bounce resonance