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PIC Simulations of Microinstabilities and Waves at Near-Sun Solar Wind Perpendicular Shocks: Predictions for Parker Solar Probe and Solar Orbiter
Alternative TitleWOS:000569608200001
Yang, Zhongwei1,2; Liu, Ying D.; Matsukiyo, Shuichi4; Lu, Quanming1; Guo, Fan5; Liu, Mingzhe6; Xie, Huasheng7,8; Gao, Xinliang1; Guo, Jun9
Source PublicationASTROPHYSICAL JOURNAL LETTERS
2020
Volume900Issue:2Pages:L24
DOI10.3847/2041-8213/abaf59
ISSN2041-8205
Language英语
KeywordPlasma astrophysics Space plasmas Plasma physics Interplanetary shocks CORONAL MASS EJECTIONS ELECTRON SHOCK ACCELERATION SCALE
AbstractMicroinstabilities and waves excited at moderate-Mach-number perpendicular shocks in the near-Sun solar wind are investigated by full particle-in-cell simulations. By analyzing the dispersion relation of fluctuating field components directly issued from the shock simulation, we obtain key findings concerning wave excitations at the shock front: (1) at the leading edge of the foot, two types of electrostatic (ES) waves are observed. The relative drift of the reflected ions versus the electrons triggers an electron cyclotron drift instability (ECDI) that excites the first ES wave. Because the bulk velocity of gyro-reflected ions shifts to the direction of the shock front, the resulting ES wave propagates oblique to the shock normal. Immediately, a fraction of incident electrons are accelerated by this ES wave and a ring-like velocity distribution is generated. They can couple with the hot Maxwellian core and excite the second ES wave around the upper hybrid frequency. (2) From the middle of the foot all the way to the ramp, electrons can couple with both incident and reflected ions. ES waves excited by ECDI in different directions propagate across each other. Electromagnetic (EM) waves (X mode) emitted toward upstream are observed in both regions. They are probably induced by a small fraction of relativistic electrons. Results shed new insight on the mechanism for the occurrence of ES wave excitations and possible EM wave emissions at young coronal mass ejection-driven shocks in the near-Sun solar wind.
Indexed BySCI
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Document Type期刊论文
Identifierhttp://ir.nssc.ac.cn/handle/122/7598
Collection中国科学院国家空间科学中心
Affiliation1.[Yang, Zhongwei; Liu, Ying D.] Chinese Acad Sci, Natl Space Sci Ctr, State Key Lab Space Weather, Beijing 100190, Peoples R China
2.Chinese Acad Sci, Univ Sci & Technol China, CAS Key Lab Geospace Environm, Hefei 230026, Peoples R China
3.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Earth & Planetary Phys, Beijing 100029, Peoples R China
4.Liu, Ying D.] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
5.Kyushu Univ, Fac Engn Sci, 6-1 Kasuga Koen, Kasuga, Fukuoka 8168580, Japan
6.Los Alamos Natl Lab, Los Alamos, NM 87545 USA
7.Univ Paris, Sorbonne Univ, Univ PSL, CNRS,LESIA,Observ Paris, 5 Pl Jules Janssen, F-92195 Meudon, France
8.Hebei Key Lab Compact Fus, Langfang 065001, Peoples R China
9.ENN Sci & Technol Dev Co Ltd, Langfang 065001, Peoples R China
10.Qingdao Univ Sci & Technol, Coll Math & Phys, Qingdao 266061, Peoples R China
Recommended Citation
GB/T 7714
Yang, Zhongwei,Liu, Ying D.,Matsukiyo, Shuichi,et al. PIC Simulations of Microinstabilities and Waves at Near-Sun Solar Wind Perpendicular Shocks: Predictions for Parker Solar Probe and Solar Orbiter[J]. ASTROPHYSICAL JOURNAL LETTERS,2020,900(2):L24.
APA Yang, Zhongwei.,Liu, Ying D..,Matsukiyo, Shuichi.,Lu, Quanming.,Guo, Fan.,...&Guo, Jun.(2020).PIC Simulations of Microinstabilities and Waves at Near-Sun Solar Wind Perpendicular Shocks: Predictions for Parker Solar Probe and Solar Orbiter.ASTROPHYSICAL JOURNAL LETTERS,900(2),L24.
MLA Yang, Zhongwei,et al."PIC Simulations of Microinstabilities and Waves at Near-Sun Solar Wind Perpendicular Shocks: Predictions for Parker Solar Probe and Solar Orbiter".ASTROPHYSICAL JOURNAL LETTERS 900.2(2020):L24.
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