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Low-frequency Whistler Waves Modulate Electrons and Generate Higher-frequency Whistler Waves in the Solar Wind

文献类型：期刊论文

作者Yao, S. T.13,14; Shi, Q. Q.14; Zong, Q. G.12; Degeling, A. W.14; Guo, R. L.14; Li, L.12; Li, J. X.11; Tian, A. M.14; Zhang, H.9,10; Yao, Z. H.8
刊名ASTROPHYSICAL JOURNAL
出版日期2021-12-01
卷号923期号:2页码:9
ISSN号0004-637X
DOI10.3847/1538-4357/ac2e97
英文摘要The role of whistler-mode waves in the solar wind and the relationship between their electromagnetic fields and charged particles is a fundamental question in space physics. Using high-temporal-resolution electromagnetic field and plasma data from the Magnetospheric MultiScale spacecraft, we report observations of low-frequency whistler waves and associated electromagnetic fields and particle behavior in the Earth's foreshock. The frequency of these whistler waves is close to half the lower-hybrid frequency (similar to 2 Hz), with their wavelength close to the ion gyroradius. The electron bulk flows are strongly modulated by these waves, with a modulation amplitude comparable to the solar wind velocity. At such a spatial scale, the electron flows are forcibly separated from the ion flows by the waves, resulting in strong electric currents and anisotropic ion distributions. Furthermore, we find that the low-frequency whistler wave propagates obliquely to the background magnetic field ( B (0)), and results in spatially periodic magnetic gradients in the direction parallel to B (0). Under such conditions, large pitch-angle electrons are trapped in wave magnetic valleys by the magnetic mirror force, and may provide free perpendicular electron energy to excite higher-frequency whistler waves. This study offers important clues and new insights into wave-particle interactions, wave generation, and microscale energy conversion processes in the solar wind.
WOS关键词HOT FLOW ANOMALIES ; MMS OBSERVATIONS ; MAGNETIC HOLES ; UPSTREAM ; TURBULENCE ; SHOCKS ; PROPAGATION ; DIFFUSION ; DYNAMICS
资助项目National Natural Science Foundation of China[41774153] ; National Natural Science Foundation of China[41961130382] ; National Natural Science Foundation of China[4210040185] ; National Natural Science Foundation of Shandong Province[ZR202103010633] ; Specialized Research Fund for State Key Laboratories ; International Space Science Institute (ISSI)
WOS研究方向Astronomy & Astrophysics
语种英语
WOS记录号WOS:000733978300001
出版者IOP Publishing Ltd
资助机构National Natural Science Foundation of China ; National Natural Science Foundation of Shandong Province ; Specialized Research Fund for State Key Laboratories ; International Space Science Institute (ISSI) ; National Natural Science Foundation of China ; National Natural Science Foundation of Shandong Province ; Specialized Research Fund for State Key Laboratories ; International Space Science Institute (ISSI) ; National Natural Science Foundation of China ; National Natural Science Foundation of Shandong Province ; Specialized Research Fund for State Key Laboratories ; International Space Science Institute (ISSI) ; National Natural Science Foundation of China ; National Natural Science Foundation of Shandong Province ; Specialized Research Fund for State Key Laboratories ; International Space Science Institute (ISSI)
源URL[http://ir.iggcas.ac.cn/handle/132A11/102959]  
专题地质与地球物理研究所_中国科学院地球与行星物理重点实验室
通讯作者Yao, S. T.
作者单位1.Beihang Univ, Sch Space & Environm, Beijing 100191, Peoples R China
2.Univ Michigan, Dept Climate & Space Sci & Engn, Ann Arbor, MI 48109 USA
3.Univ Paris Saclay, Lab Phys Plasmas, Obs Paris, Ecole Polytech,Inst Polytech Paris,CNRS, Paris, France
4.Univ New Hampshire, Durham, NH 03824 USA
5.Univ Colorado, Dept Astrophys & Planetary Sci, Boulder, CO 80309 USA
6.Royal Inst Technol, Stockholm, Sweden
7.NASA, Goddard Space Flight Ctr, Greenbelt, MD USA
8.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Earth & Planetary Phys, Beijing 100029, Peoples R China
9.Univ Alaska Fairbanks, Geophys Inst, Fairbanks, AK 99775 USA
10.Univ Alaska Fairbanks, Phys Dept, Fairbanks, AK 99775 USA
推荐引用方式
GB/T 7714		 Yao, S. T.,Shi, Q. Q.,Zong, Q. G.,et al. Low-frequency Whistler Waves Modulate Electrons and Generate Higher-frequency Whistler Waves in the Solar Wind[J]. ASTROPHYSICAL JOURNAL,2021,923(2):9.
APA Yao, S. T..,Shi, Q. Q..,Zong, Q. G..,Degeling, A. W..,Guo, R. L..,...&Pollock, C. J..(2021).Low-frequency Whistler Waves Modulate Electrons and Generate Higher-frequency Whistler Waves in the Solar Wind.ASTROPHYSICAL JOURNAL,923(2),9.
MLA Yao, S. T.,et al."Low-frequency Whistler Waves Modulate Electrons and Generate Higher-frequency Whistler Waves in the Solar Wind".ASTROPHYSICAL JOURNAL 923.2(2021):9.

入库方式： OAI收割

来源：地质与地球物理研究所

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