Importance of electric fields in modeling space plasmas

被引：1

作者：

Parks, George K. ^{[1
]}

机构：

[1] Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA

来源：

JOURNAL OF ATMOSPHERIC AND SOLAR-TERRESTRIAL PHYSICS | 2007年 / 69卷 / 1-2期

关键词：

ideal MHD; electric field; collisionless plasma;

D O I：

10.1016/j.jastp.2006.07.009

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

Many space plasma models use magnetohydrodynamic (MHD) theory with the approximation that the high conductivity of plasmas does not support electric fields in the fluid frame (ideal approximation). We will show that physics is consistent only if the small electric field is included. Even then, MHD theory requires knowledge about collisionless conductivity for which there is little information. MHD theory has other restrictions that make it inapplicable to collisionless space plasmas. We apply MHD and ideal MHD concepts to observations and discuss why they are not adequate. There is an urgent need to develop kinetic models that correctly describe space plasmas. (c) 2006 Elsevier Ltd. All rights reserved.

引用

页码：18 / 23

页数：6

共 19 条

[1] ELECTRIC CURRENTS IN COSMIC PLASMAS [J].

ALFVEN, H .

REVIEWS OF GEOPHYSICS, 1977, 15 (03) :271-284

[2]

Alfven H., 1963, Cosmical Electrodynamics

[3] A COMPONENT OF NONGYROTROPIC (PHASE-BUNCHED) ELECTRONS UPSTREAM FROM THE EARTHS BOW SHOCK [J].

ANDERSON, KA ;

LIN, RP ;

GURGIOLO, C ;

PARKS, GK ;

POTTER, DW ;

WERDEN, S ;

REME, H .

JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 1985, 90 (NA11) :809-814

[4] STATISTICAL CHARACTERISTICS OF BURSTY BULK FLOW EVENTS [J].

ANGELOPOULOS, V ;

KENNEL, CF ;

CORONITI, FV ;

PELLAT, R ;

KIVELSON, MG ;

WALKER, RJ ;

RUSSELL, CT ;

BAUMJOHANN, W ;

FELDMAN, WC ;

GOSLING, JT .

JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 1994, 99 (A11) :21257-21280

[5]

Chapman S., 1931, Terrestrial Magnetism and Atmospheric Electricity, V36, P171, DOI [DOI 10.1029/TE036I002P00077, 10.1029/TE036i002p00077, DOI 10.1029/TE036I003P00171]

[6] Kinetic properties of bursty bulk flow events [J].

Chen, LJ ;

Parks, GK ;

McCarthy, M ;

Larson, D ;

Lin, RP .

GEOPHYSICAL RESEARCH LETTERS, 2000, 27 (13) :1847-1850

[7] ELECTRIC-FIELDS IN THE MAGNETOSPHERE - A REVIEW [J].

FALTHAMMAR, CG .

PLANETARY AND SPACE SCIENCE, 1989, 37 (08) :899-914

[8] Comparison of plasma sheet dynamics during pseudobreakups and expansive aurorae [J].

Fillingim, MO ;

Parks, GK ;

Chen, LJ ;

McCarthy, M ;

Spann, JF ;

Lin, RP .

PHYSICS OF PLASMAS, 2001, 8 (04) :1127-1132

[9] NON-E X B ORDERED ION-BEAMS UPSTREAM OF THE EARTHS BOW SHOCK [J].

GURGIOLO, C ;

PARKS, GK ;

MAUK, BH ;

LIN, CS ;

ANDERSON, KA ;

LIN, RP ;

REME, H .

JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 1981, 86 (NA6) :4415-4424

[10]

Jackson J. D., 1975, CLASSICAL ELECTRODYN

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