MMS Measurements of the Vlasov Equation: Probing the Electron Pressure Divergence Within Thin Current Sheets

doi:10.1029/2019GL083549

GSTDTAP > 气候变化

DOI	10.1029/2019GL083549
	MMS Measurements of the Vlasov Equation: Probing the Electron Pressure Divergence Within Thin Current Sheets
	Shuster, J. R.1,2; Gershman, D. J.2; Chen, L-J 2; Wang, S.1,2; Bessho, N.1,2; Dorelli, J. C.2; da Silva, D. E.2,3,4; Giles, B. L.2; Paterson, W. R.2; Denton, R. E.5; Schwartz, S. J.6; Norgred, C.7; Wilder, F. D.6; Cassak, P. A.8; Swisdak, M.9; Uritsky, V 2,10; Schiff, C.2; Rager, A. C.2,10; Smith, S.1,10; Avanov, L. A.1,2; Vinas, A. F.1
	2019-07-28
发表期刊	GEOPHYSICAL RESEARCH LETTERS
ISSN	0094-8276
EISSN	1944-8007
出版年	2019
卷号	46 期号:14 页码:7862-7872
文章类型	Article
语种	英语
国家	USA; Norway
英文摘要	We investigate the kinetic structure of electron-scale current sheets found in the vicinity of the magnetopause and embedded in the magnetosheath within the reconnection exhaust. A new technique for computing terms of the Vlasov equation using Magnetospheric Multiscale (MMS) measurements is presented and applied to study phase space density gradients and the kinetic origins of the electron pressure divergence found within these current sheets. Crescent-shaped structures in del(perpendicular to 2)f(e) give rise to bipolar and quadrupolar signatures in v . del f(e) measured near the maximum del . P-e inside the current layers. The current density perpendicular to the magnetic field is strong (J(perpendicular to) similar to 2 mu A/m(2)), and the thickness of the current layers ranges from 3 to 5 electron inertial lengths. The electron flows supporting the current layers mainly result from the combination of E x B and diamagnetic drifts. We find nonzero J . E' within the current sheets even though they are observed apart from typical diffusion region signatures.
英文关键词	Vlasov equation thin current sheets electron pressure divergence Magnetospheric Multiscale energy conversion kinetic plasma physics
领域	气候变化
收录类别	SCI-E
WOS记录号	WOS:000481818900001
WOS关键词	MAGNETIC RECONNECTION ; DIFFUSION REGION ; MAGNETOPAUSE ; EXHAUST ; FIELD
WOS类目	Geosciences, Multidisciplinary
WOS研究方向	Geology
引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/185264
专题	气候变化
作者单位	1.Univ Maryland, Dept Astron, College Pk, MD 20742 USA; 2.NASA, Goddard Space Flight Ctr, Code 916, Greenbelt, MD 20771 USA; 3.Trident Vantage Syst, Greenbelt, MD USA; 4.Johns Hopkins Univ, Whiting Sch Engn, Baltimore, MD USA; 5.Dartmouth Coll, Dept Phys & Astron, Hanover, NH 03755 USA; 6.Univ Colorado, Lab Atmospher & Space Phys, Boulder, CO 80309 USA; 7.Univ Bergen, Birkeland Ctr Space Sci, Dept Phys & Technol, Bergen, Norway; 8.West Virginia Univ, Dept Phys & Astron, Morgantown, WV 26506 USA; 9.Univ Maryland, Inst Res Elect & Appl Phys, College Pk, MD 20742 USA; 10.Catholic Univ Amer, Dept Phys, Washington, DC 20064 USA
推荐引用方式 GB/T 7714	Shuster, J. R.,Gershman, D. J.,Chen, L-J,et al. MMS Measurements of the Vlasov Equation: Probing the Electron Pressure Divergence Within Thin Current Sheets[J]. GEOPHYSICAL RESEARCH LETTERS,2019,46(14):7862-7872.
APA	Shuster, J. R..,Gershman, D. J..,Chen, L-J.,Wang, S..,Bessho, N..,...&Vinas, A. F..(2019).MMS Measurements of the Vlasov Equation: Probing the Electron Pressure Divergence Within Thin Current Sheets.GEOPHYSICAL RESEARCH LETTERS,46(14),7862-7872.
MLA	Shuster, J. R.,et al."MMS Measurements of the Vlasov Equation: Probing the Electron Pressure Divergence Within Thin Current Sheets".GEOPHYSICAL RESEARCH LETTERS 46.14(2019):7862-7872.