Electron Mixing and Isotropization in the Exhaust of Asymmetric Magnetic Reconnection With a Guide Field
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- Chinese Academy of Sciences (CAS), Beijing (China)
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Swedish Inst. of Space Physics, Uppsala (Sweden)
- Univ. of Science and Technology of China, Hefei (China)
- Univ. of Wisconsin, Madison, WI (United States)
- NASA Goddard Space Flight Center (GSFC), Greenbelt, MD (United States); Univ. of Maryland, College Park, MD (United States)
- NASA Goddard Space Flight Center (GSFC), Greenbelt, MD (United States)
- KTH Royal Inst. of Technology, Stockholm (Sweden)
- Univ. of Colorado, Boulder, CO (United States)
- Univ. of California, Los Angeles, CA (United States)
- Southwest Research Institute, San Antonio, TX (United States)
In this work, we investigate an exhaust crossing of asymmetric guide field reconnection observed by Magnetospheric Multiscale (MMS) mission at Earth's dayside magnetopause. One MMS spacecraft (MMS 4) observes multicomponent electron distributions, including two counterstreaming electron beams, while the other three MMS spacecraft, with a separation of ~30 km, record nearly isotropic electron distributions. As counterstreaming electrons are unstable for the electron two-stream instability, our observations suggest that the electrostatic waves generated by the fast-growing electron two-stream instability can contribute to the rapid isotropization of electron distributions in the reconnection exhaust, indicating that wave-particle interactions play an important role in electron dynamics.
- Research Organization:
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Sponsoring Organization:
- USDOE National Nuclear Security Administration (NNSA); National Natural Science Foundation of China (NSFC); Chinese Academy of Sciences
- Grant/Contract Number:
- 89233218CNA000001; 41974196; 41974170; 41731070; 41674174; QYZDJ-SSW-JSC028; XDA15052500
- OSTI ID:
- 1814781
- Report Number(s):
- LA-UR-20-22751
- Journal Information:
- Geophysical Research Letters, Vol. 47, Issue 14; ISSN 0094-8276
- Publisher:
- American Geophysical UnionCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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