Electron Crescent Distributions as a Manifestation of Diamagnetic Drift in an Electron-Scale Current Sheet: Magnetospheric Multiscale Observations Using New 7.5 ms Fast Plasma Investigation Moments

被引：55

作者：

Rager, A. C. ^{[1
,2
]}

Dorelli, J. C. ^{[2
]}

Gershman, D. J. ^{[2
]}

Uritsky, V. ^{[1
,2
]}

Avanov, L. A. ^{[2
,3
]}

Torbert, R. B. ^{[4
,5
]}

Burch, J. L. ^{[5
]}

Ergun, R. E. ^{[6
]}

Egedal, J. ^{[7
]}

Schiff, C. ^{[2
]}

Shuster, J. R. ^{[2
,3
]}

Giles, B. L. ^{[2
]}

Paterson, W. R. ^{[2
]}

Pollock, C. J. ^{[8
]}

Strangeway, R. J. ^{[9
]}

Russell, C. T. ^{[9
]}

Lavraud, B. ^{[10
]}

Coffey, V. N. ^{[11
]}

Saito, Y. ^{[12
]}

机构：

[1] Catholic Univ Amer, Dept Phys, Washington, DC 20064 USA

[2] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA

[3] Univ Maryland, Dept Astron, College Pk, MD 20742 USA

[4] Univ New Hampshire, Dept Phys, Durham, NH 03824 USA

[5] Southwest Res Inst, San Antonio, TX USA

[6] Univ Colorado, Astrophys & Planetary Sci, Boulder, CO 80309 USA

[7] Univ Wisconsin, Dept Phys, 1150 Univ Ave, Madison, WI 53706 USA

[8] Denali Sci, Healy, AK USA

[9] Univ Calif Los Angeles, Earth Planetary & Space Sci, Los Angeles, CA USA

[10] Res Inst Astrophys & Planetol, Toulouse, France

[11] NASA, Marshall Space Flight Ctr, Huntsville, AL USA

[12] Inst Space & Astronaut Sci, Sagamihara, Kanagawa, Japan

来源：

GEOPHYSICAL RESEARCH LETTERS | 2018年 / 45卷 / 02期

基金：

美国国家航空航天局;

关键词：

ASYMMETRIC MAGNETIC RECONNECTION; DIFFUSION REGION; MAGNETOPAUSE RECONNECTION;

D O I：

10.1002/2017GL076260

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

We report Magnetospheric Multiscale observations of electron pressure gradient electric fields near a magnetic reconnection diffusion region using a new technique for extracting 7.5 ms electron moments from the Fast Plasma Investigation. We find that the deviation of the perpendicular electron bulk velocity from E x B drift in the interval where the out-of-plane current density is increasing can be explained by the diamagnetic drift. In the interval where the out-of-plane current is transitioning to in-plane current, the electron momentum equation is not satisfied at 7.5 ms resolution.

引用

页码：578 / 584

页数：7

共 17 条

[1] Electron distribution functions in the diffusion region of asymmetric magnetic reconnection [J].

Bessho, N. ;

Chen, L. -J. ;

Hesse, M. .

GEOPHYSICAL RESEARCH LETTERS, 2016, 43 (05) :1828-1836

[2] Magnetospheric Multiscale Overview and Science Objectives [J].

Burch, J. L. ;

Moore, T. E. ;

Torbert, R. B. ;

Giles, B. L. .

SPACE SCIENCE REVIEWS, 2016, 199 (1-4) :5-21

[3] Electron-scale measurements of magnetic reconnection in space [J].

Burch, J. L. ;

Torbert, R. B. ;

Phan, T. D. ;

Chen, L. -J. ;

Moore, T. E. ;

Ergun, R. E. ;

Eastwood, J. P. ;

Gershman, D. J. ;

Cassak, P. A. ;

Argall, M. R. ;

Wang, S. ;

Hesse, M. ;

Pollock, C. J. ;

Giles, B. L. ;

Nakamura, R. ;

Mauk, B. H. ;

Fuselier, S. A. ;

Russell, C. T. ;

Strangeway, R. J. ;

Drake, J. F. ;

Shay, M. A. ;

Khotyaintsev, Yu. V. ;

Lindqvist, P. -A. ;

Marklund, G. ;

Wilder, F. D. ;

Young, D. T. ;

Torkar, K. ;

Goldstein, J. ;

Dorelli, J. C. ;

Avanov, L. A. ;

Oka, M. ;

Baker, D. N. ;

Jaynes, A. N. ;

Goodrich, K. A. ;

Cohen, I. J. ;

Turner, D. L. ;

Fennell, J. F. ;

Blake, J. B. ;

Clemmons, J. ;

Goldman, M. ;

Newman, D. ;

Petrinec, S. M. ;

Trattner, K. J. ;

Lavraud, B. ;

Reiff, P. H. ;

Baumjohann, W. ;

Magnes, W. ;

Steller, M. ;

Lewis, W. ;

Saito, Y. .

SCIENCE, 2016, 352 (6290)

[4]

Burch J. L., 2017, LOCALIZED OSCILLATOR

[5] Electron energization and mixing observed by MMS in the vicinity of an electron diffusion region during magnetopause reconnection [J].

Chen, Li-Jen ;

Hesse, Michael ;

Wang, Shan ;

Gershman, Daniel ;

Ergun, Robert ;

Pollock, Craig ;

Torbert, Roy ;

Bessho, Naoki ;

Daughton, William ;

Dorelli, John ;

Giles, Barbara ;

Strangeway, Robert ;

Russell, Christopher ;

Khotyaintsev, Yuri ;

Burch, Jim ;

Moore, Thomas ;

Lavraud, Benoit ;

Phan, Tai ;

Avanov, Levon .

GEOPHYSICAL RESEARCH LETTERS, 2016, 43 (12) :6036-6043

[6] Spacecraft Observations and Analytic Theory of Crescent-Shaped Electron Distributions in Asymmetric Magnetic Reconnection [J].

Egedal, J. ;

Le, A. ;

Daughton, W. ;

Wetherton, B. ;

Cassak, P. A. ;

Chen, L. -J ;

Lavraud, B. ;

Torbert, R. B. ;

Dorelli, J. ;

Gershman, D. J. ;

Avanov, L. A. .

PHYSICAL REVIEW LETTERS, 2016, 117 (18)

[7] The calculation of moment uncertainties from velocity distribution functions with random errors [J].

Gershman, Daniel J. ;

Dorelli, John C. ;

F-Vinas, Adolfo ;

Pollock, Craig J. .

JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 2015, 120 (08) :6633-6645

[8] On the electron diffusion region in planar, asymmetric, systems [J].

Hesse, Michael ;

Aunai, Nicolas ;

Sibeck, David ;

Birn, Joachim .

GEOPHYSICAL RESEARCH LETTERS, 2014, 41 (24) :8673-8680

[9] The Diffusion Region in Collisionless Magnetic Reconnection [J].

Hesse, Michael ;

Neukirch, Thomas ;

Schindler, Karl ;

Kuznetsova, Masha ;

Zenitani, Seiji .

SPACE SCIENCE REVIEWS, 2011, 160 (1-4) :3-23

[10] MAGNETIC EFFECTS OF QUIET-TIME PROTON BELT [J].

HOFFMAN, RA ;

BRACKEN, PA .

JOURNAL OF GEOPHYSICAL RESEARCH, 1965, 70 (15) :3541-&

← 1 2 →