In-situ observations of the magnetothermodynamic evolution of electron-only reconnection

被引：3

作者：

Payne, D. S. ^{[1
]}

Swisdak, M. ^{[1
]}

Eastwood, J. P. ^{[2
]}

Drake, J. F. ^{[1
]}

Pyakurel, P. S. ^{[3
]}

Shuster, J. R. ^{[4
]}

机构：

[1] Univ Maryland, Inst Res Elect & Appl Phys, College Pk, MD 20742 USA

[2] Imperial Coll, Blackett Lab, London, England

[3] Univ Calif Berkeley, Space Sci Lab, Berkeley, CA USA

[4] Univ New Hampshire, Space Sci Ctr, Durham, NH USA

来源：

COMMUNICATIONS PHYSICS | 2025年 / 8卷 / 01期

关键词：

MAGNETIC RECONNECTION;

D O I：

10.1038/s42005-025-01948-y

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Field-particle energy exchange is important to the magnetic reconnection process, but uncertainties regarding the time evolution of this exchange remain. We investigate the temporal dynamics of field-particle energy exchange during magnetic reconnection, using Magnetospheric Multiscale mission observations of an electron-only reconnection event in the magnetosheath. The electron energy is in local minimum at the x-line due to a density depletion, while the magnetic energy is in local maximum due to a guide field enhancement. The electromagnetic energy transport comes almost entirely from guide field contributions and is confined within the reconnection plane, while the most significant contribution to electron energy transport is independent of the drift velocity with additional out-of-plane signatures. Multi-spacecraft analysis suggests that the guide field energy is decreasing while the electron density is increasing, both evolving such that the system is moving toward a more uniform distribution of magnetic and thermal energy.

引用

页数：9

共 38 条

[1] Theory, observations, and simulations of kinetic entropy in a magnetotail electron diffusion region [J].

Argall, M. R. ;

Barbhuiya, M. H. ;

Cassak, P. A. ;

Wang, S. ;

Shuster, J. ;

Liang, H. ;

Gershman, D. J. ;

Torbert, R. B. ;

Burch, J. L. .

PHYSICS OF PLASMAS, 2022, 29 (02)

[2] Collisional-like dissipation in collisionless plasmas [J].

Bandyopadhyay, Riddhi ;

Yang, Yan ;

Matthaeus, William H. ;

Parashar, Tulasi N. ;

Roytershteyn, Vadim ;

Chasapis, Alexandros ;

Gershman, D. J. ;

Giles, B. L. ;

Burch, J. L. .

PHYSICS OF PLASMAS, 2023, 30 (08)

[3] Energy release and conversion by reconnection in the magnetotail [J].

Birn, J ;

Hesse, M .

ANNALES GEOPHYSICAE, 2005, 23 (10) :3365-3373

[4] Energy release and transfer in guide field reconnection [J].

Birn, J. ;

Hesse, M. .

PHYSICS OF PLASMAS, 2010, 17 (01)

[5] Magnetic reconnection at the dayside magnetopause: Advances with MMS [J].

Burch, J. L. ;

Phan, T. D. .

GEOPHYSICAL RESEARCH LETTERS, 2016, 43 (16) :8327-8338

[6]

Cassak P.A., 2022, Phys. Plasmas., V29

[7] Quantifying Energy Conversion in Higher-Order Phase Space Density Moments in Plasmas [J].

Cassak, Paul A. ;

Barbhuiya, M. Hasan ;

Liang, Haoming ;

Argall, Matthew R. .

PHYSICAL REVIEW LETTERS, 2023, 130 (08)

[8]

Challenge R., 2001, J. Geophys. Res, V106, P3715, DOI [10.1029/1999JA900449, DOI 10.1029/1999JA900449]

[9] Energy Flux Densities near the Electron Dissipation Region in Asymmetric Magnetopause Reconnection [J].

Eastwood, J. P. ;

Goldman, M., V ;

Phan, T. D. ;

Stawarz, J. E. ;

Cassak, P. A. ;

Drake, J. F. ;

Newman, D. ;

Lavraud, B. ;

Shay, M. A. ;

Ergun, R. E. ;

Burch, J. L. ;

Gershman, D. J. ;

Giles, B. L. ;

Lindqvist, P. A. ;

Torbert, R. B. ;

Strangeway, R. J. ;

Russell, C. T. .

PHYSICAL REVIEW LETTERS, 2020, 125 (26)

[10] Energy Partition in Magnetic Reconnection in Earth's Magnetotail [J].

Eastwood, J. P. ;

Phan, T. D. ;

Drake, J. F. ;

Shay, M. A. ;

Borg, A. L. ;

Lavraud, B. ;

Taylor, M. G. G. T. .

PHYSICAL REVIEW LETTERS, 2013, 110 (22)

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