MESSENGER observations of Alfvenic and compressional waves during   Mercury&apos;s substorms

doi:10.1002/2015GL065452

CORC > 北京大学 > 地球与空间科学学院

	MESSENGER observations of Alfvenic and compressional waves during Mercury's substorms
	Sun, Wei-Jie ; Slavin, James A. ; Fu, Suiyan ; Raines, Jim M. ; Sundberg, Torbjoern ; Zong, Qiu-Gang ; Jia, Xianzhe ; Shi, Quanqi ; Shen, Xiaochen ; Poh, Gangkai ; Pu, Zuyin ; Zurbuchen, Thomas H.
刊名	GEOPHYSICAL RESEARCH LETTERS
	2015
关键词	Mercury substorm Alfven wave compressional wave Pi2 pulsation FIELD-ALIGNED CURRENTS PI2 PULSATIONS PLASMA SHEET MAGNETOSPHERIC SUBSTORMS MAGNETIC PULSATIONS CURRENT SYSTEM CURRENT WEDGE FLOW BRAKING MAGNETOTAIL IONOSPHERE
DOI	10.1002/2015GL065452
英文摘要	MErcury Surface, Space ENviroment, GEochemistry, and Ranging (MESSENGER) magnetic field measurements during the substorm expansion phase in Mercury's magnetotail have been examined for evidence of low-frequency plasma waves, e.g., Pi2-like pulsations. It has been revealed that the B-y fluctuations accompanying substorm dipolarizations are consistent with pulses of field-aligned currents near the high-latitude edge of the plasma sheet. Detailed analysis of the B-y fluctuations reveals that they are near circularly polarized electromagnetic waves, most likely Alfven waves. Soon afterward the plasma sheet thickened and MESSENGER detected a series of compressional waves. These Alfvenic and compressional waves have similar durations (10-20s), suggesting that they may arise from the same source. Drawing on Pi2 pulsation models developed for Earth, we suggest that the Alfvenic and compressional waves reported here at Mercury may be generated by the quasi-periodic sunward flow bursts in Mercury's plasma sheet. But because they are observed during the period with rapid magnetic field reconfiguration, we cannot fully exclude the possibility of standing Alfven wave.; NASA Discovery Program [NASW-00002, NAS5-97271]; State Scholarship Fund of Chinese Scholarship Council; National Nature Science Foundation of China [41474139, 41421003]; Major Project of Chinese National Programs for Fundamental Research and Development [2012CB825603]; NASA Heliophysics Supporting Research Program [NNX15AJ68G]; SCI(E); EI; ARTICLE; weijiesun@pku.edu.cn; 15; 6189-6198; 42
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/417174]
专题	地球与空间科学学院
推荐引用方式 GB/T 7714	Sun, Wei-Jie,Slavin, James A.,Fu, Suiyan,et al. MESSENGER observations of Alfvenic and compressional waves during Mercury's substorms[J]. GEOPHYSICAL RESEARCH LETTERS,2015.
APA	Sun, Wei-Jie.,Slavin, James A..,Fu, Suiyan.,Raines, Jim M..,Sundberg, Torbjoern.,...&Zurbuchen, Thomas H..(2015).MESSENGER observations of Alfvenic and compressional waves during Mercury's substorms.GEOPHYSICAL RESEARCH LETTERS.
MLA	Sun, Wei-Jie,et al."MESSENGER observations of Alfvenic and compressional waves during Mercury's substorms".GEOPHYSICAL RESEARCH LETTERS (2015).