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MMS Direct Observations of Kinetic-scale Shock Self-reformation

文献类型：期刊论文

作者Yang, Zhongwei1,2,3; Liu, Ying D.2,4; Johlander, Andreas5; Parks, George K.6; Lavraud, Benoit7; Lee, Ensang8; Baumjohann, Wolfgang9; Wang, Rui2; Burch, James L.10
刊名ASTROPHYSICAL JOURNAL LETTERS
出版日期2020-09-01
卷号901期号:1页码:6
ISSN号2041-8205
关键词Shocks Solar-planetary interactions Plasma astrophysics
DOI10.3847/2041-8213/abb3ff
英文摘要Studies of shocks have long suggested that a shock can undergo cyclical self-reformation on a timescale of ion cyclotron period. This process has been proposed as a primary mechanism for energy dissipation and energetic particle acceleration at shocks. Unambiguous observational evidence, however, has remained elusive. Here, we report direct observations for the self-reformation process of a collisionless, high Mach number, quasi-perpendicular shock using Magnetospheric Multiscale (MMS) measurements. We find that reflected ions by the old shock ramp form a clear phase-space vortex, which gives rise to a new ramp. The new ramp observed by MMS2 has not yet developed to a mature stage during the self-reformation, and is not strong enough to reflect incident ions. Consequently, these ions are only slightly slowed down and show a flat velocity profile from the new ramp all the way to the old one. The present results provide direct evidence of shock self-reformation, and also shed light on energy dissipation and energetic particle acceleration at collisionless shocks throughout the universe.
WOS关键词QUASI-PERPENDICULAR SHOCKS ; COLLISIONLESS-SHOCK ; NONSTATIONARITY ; PLASMA ; ION ; ACCELERATION ; REGIONS ; WIND
资助项目Swedish Institute of Space Physics ; database on NASA ; VR System of State Key Laboratory of Space Weather ; HPC of Chinese Meridian Project ; NSFC[41574140] ; NSFC[41674168] ; NSFC[41774179] ; Specialized Research Fund for State Key Laboratories of China, Youth Innovation Promotion Association of the CAS[2017188] ; Open Research Program Key laboratory of Polar Science[KP202005] ; NSF of Beijing Municipality[1192018] ; Beijing Outstanding Talent Training Foundation[2017000097607G049] ; Beijing Municipal Science and Technology Commission[Z191100004319001] ; Beijing Municipal Science and Technology Commission[Z191100004319003] ; Swedish National Space Board[139/12] ; Swedish National Space Board[97/13]
WOS研究方向Astronomy & Astrophysics
语种英语
出版者IOP PUBLISHING LTD
WOS记录号WOS:000574529500001
资助机构Swedish Institute of Space Physics ; Swedish Institute of Space Physics ; Swedish Institute of Space Physics ; Swedish Institute of Space Physics ; database on NASA ; database on NASA ; database on NASA ; database on NASA ; VR System of State Key Laboratory of Space Weather ; VR System of State Key Laboratory of Space Weather ; VR System of State Key Laboratory of Space Weather ; VR System of State Key Laboratory of Space Weather ; HPC of Chinese Meridian Project ; HPC of Chinese Meridian Project ; HPC of Chinese Meridian Project ; HPC of Chinese Meridian Project ; NSFC ; NSFC ; NSFC ; NSFC ; Specialized Research Fund for State Key Laboratories of China, Youth Innovation Promotion Association of the CAS ; Specialized Research Fund for State Key Laboratories of China, Youth Innovation Promotion Association of the CAS ; Specialized Research Fund for State Key Laboratories of China, Youth Innovation Promotion Association of the CAS ; Specialized Research Fund for State Key Laboratories of China, Youth Innovation Promotion Association of the CAS ; Open Research Program Key laboratory of Polar Science ; Open Research Program Key laboratory of Polar Science ; Open Research Program Key laboratory of Polar Science ; Open Research Program Key laboratory of Polar Science ; NSF of Beijing Municipality ; NSF of Beijing Municipality ; NSF of Beijing Municipality ; NSF of Beijing Municipality ; Beijing Outstanding Talent Training Foundation ; Beijing Outstanding Talent Training Foundation ; Beijing Outstanding Talent Training Foundation ; Beijing Outstanding Talent Training Foundation ; Beijing Municipal Science and Technology Commission ; Beijing Municipal Science and Technology Commission ; Beijing Municipal Science and Technology Commission ; Beijing Municipal Science and Technology Commission ; Swedish National Space Board ; Swedish National Space Board ; Swedish National Space Board ; Swedish National Space Board ; Swedish Institute of Space Physics ; Swedish Institute of Space Physics ; Swedish Institute of Space Physics ; Swedish Institute of Space Physics ; database on NASA ; database on NASA ; database on NASA ; database on NASA ; VR System of State Key Laboratory of Space Weather ; VR System of State Key Laboratory of Space Weather ; VR System of State Key Laboratory of Space Weather ; VR System of State Key Laboratory of Space Weather ; HPC of Chinese Meridian Project ; HPC of Chinese Meridian Project ; HPC of Chinese Meridian Project ; HPC of Chinese Meridian Project ; NSFC ; NSFC ; NSFC ; NSFC ; Specialized Research Fund for State Key Laboratories of China, Youth Innovation Promotion Association of the CAS ; Specialized Research Fund for State Key Laboratories of China, Youth Innovation Promotion Association of the CAS ; Specialized Research Fund for State Key Laboratories of China, Youth Innovation Promotion Association of the CAS ; Specialized Research Fund for State Key Laboratories of China, Youth Innovation Promotion Association of the CAS ; Open Research Program Key laboratory of Polar Science ; Open Research Program Key laboratory of Polar Science ; Open Research Program Key laboratory of Polar Science ; Open Research Program Key laboratory of Polar Science ; NSF of Beijing Municipality ; NSF of Beijing Municipality ; NSF of Beijing Municipality ; NSF of Beijing Municipality ; Beijing Outstanding Talent Training Foundation ; Beijing Outstanding Talent Training Foundation ; Beijing Outstanding Talent Training Foundation ; Beijing Outstanding Talent Training Foundation ; Beijing Municipal Science and Technology Commission ; Beijing Municipal Science and Technology Commission ; Beijing Municipal Science and Technology Commission ; Beijing Municipal Science and Technology Commission ; Swedish National Space Board ; Swedish National Space Board ; Swedish National Space Board ; Swedish National Space Board ; Swedish Institute of Space Physics ; Swedish Institute of Space Physics ; Swedish Institute of Space Physics ; Swedish Institute of Space Physics ; database on NASA ; database on NASA ; database on NASA ; database on NASA ; VR System of State Key Laboratory of Space Weather ; VR System of State Key Laboratory of Space Weather ; VR System of State Key Laboratory of Space Weather ; VR System of State Key Laboratory of Space Weather ; HPC of Chinese Meridian Project ; HPC of Chinese Meridian Project ; HPC of Chinese Meridian Project ; HPC of Chinese Meridian Project ; NSFC ; NSFC ; NSFC ; NSFC ; Specialized Research Fund for State Key Laboratories of China, Youth Innovation Promotion Association of the CAS ; Specialized Research Fund for State Key Laboratories of China, Youth Innovation Promotion Association of the CAS ; Specialized Research Fund for State Key Laboratories of China, Youth Innovation Promotion Association of the CAS ; Specialized Research Fund for State Key Laboratories of China, Youth Innovation Promotion Association of the CAS ; Open Research Program Key laboratory of Polar Science ; Open Research Program Key laboratory of Polar Science ; Open Research Program Key laboratory of Polar Science ; Open Research Program Key laboratory of Polar Science ; NSF of Beijing Municipality ; NSF of Beijing Municipality ; NSF of Beijing Municipality ; NSF of Beijing Municipality ; Beijing Outstanding Talent Training Foundation ; Beijing Outstanding Talent Training Foundation ; Beijing Outstanding Talent Training Foundation ; Beijing Outstanding Talent Training Foundation ; Beijing Municipal Science and Technology Commission ; Beijing Municipal Science and Technology Commission ; Beijing Municipal Science and Technology Commission ; Beijing Municipal Science and Technology Commission ; Swedish National Space Board ; Swedish National Space Board ; Swedish National Space Board ; Swedish National Space Board ; Swedish Institute of Space Physics ; Swedish Institute of Space Physics ; Swedish Institute of Space Physics ; Swedish Institute of Space Physics ; database on NASA ; database on NASA ; database on NASA ; database on NASA ; VR System of State Key Laboratory of Space Weather ; VR System of State Key Laboratory of Space Weather ; VR System of State Key Laboratory of Space Weather ; VR System of State Key Laboratory of Space Weather ; HPC of Chinese Meridian Project ; HPC of Chinese Meridian Project ; HPC of Chinese Meridian Project ; HPC of Chinese Meridian Project ; NSFC ; NSFC ; NSFC ; NSFC ; Specialized Research Fund for State Key Laboratories of China, Youth Innovation Promotion Association of the CAS ; Specialized Research Fund for State Key Laboratories of China, Youth Innovation Promotion Association of the CAS ; Specialized Research Fund for State Key Laboratories of China, Youth Innovation Promotion Association of the CAS ; Specialized Research Fund for State Key Laboratories of China, Youth Innovation Promotion Association of the CAS ; Open Research Program Key laboratory of Polar Science ; Open Research Program Key laboratory of Polar Science ; Open Research Program Key laboratory of Polar Science ; Open Research Program Key laboratory of Polar Science ; NSF of Beijing Municipality ; NSF of Beijing Municipality ; NSF of Beijing Municipality ; NSF of Beijing Municipality ; Beijing Outstanding Talent Training Foundation ; Beijing Outstanding Talent Training Foundation ; Beijing Outstanding Talent Training Foundation ; Beijing Outstanding Talent Training Foundation ; Beijing Municipal Science and Technology Commission ; Beijing Municipal Science and Technology Commission ; Beijing Municipal Science and Technology Commission ; Beijing Municipal Science and Technology Commission ; Swedish National Space Board ; Swedish National Space Board ; Swedish National Space Board ; Swedish National Space Board
源URL[http://ir.iggcas.ac.cn/handle/132A11/98283]  
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Yang, Zhongwei
作者单位1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Earth & Planetary Phys, Beijing 100029, Peoples R China
2.Chinese Acad Sci, Natl Space Sci Ctr, State Key Lab Space Weather, Beijing 100190, Peoples R China
3.Polar Res Inst China, Key Lab Polar Sci, MNR, Shanghai 200136, Peoples R China
4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
5.Univ Helsinki, Helsinki, Finland
6.Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA
7.Univ Toulouse, Inst Rech Astrophys & Planetol, Toulouse, France
8.Kyung Hee Univ, Yongin, South Korea
9.Austrian Acad Sci, Space Res Inst, Graz, Austria
10.Southwest Res Inst, San Antonio, TX USA
推荐引用方式
GB/T 7714		 Yang, Zhongwei,Liu, Ying D.,Johlander, Andreas,et al. MMS Direct Observations of Kinetic-scale Shock Self-reformation[J]. ASTROPHYSICAL JOURNAL LETTERS,2020,901(1):6.
APA Yang, Zhongwei.,Liu, Ying D..,Johlander, Andreas.,Parks, George K..,Lavraud, Benoit.,...&Burch, James L..(2020).MMS Direct Observations of Kinetic-scale Shock Self-reformation.ASTROPHYSICAL JOURNAL LETTERS,901(1),6.
MLA Yang, Zhongwei,et al."MMS Direct Observations of Kinetic-scale Shock Self-reformation".ASTROPHYSICAL JOURNAL LETTERS 901.1(2020):6.

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来源：地质与地球物理研究所

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