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Poster De Conférence Année : 2017

Small-Scale Dayside Magnetic Reconnection Analysis via MMS

K. R. Pritchard
  • Fonction : Auteur
J. L. Burch
  • Fonction : Auteur
S. A. Fuselier
J. Webster
  • Fonction : Auteur
K. Genestreti
  • Fonction : Auteur
R. B. Torbert
  • Fonction : Auteur
A. C. Rager
  • Fonction : Auteur
T. Phan
M. R. Argall
  • Fonction : Auteur
Olivier Le Contel
C. T. Russell
  • Fonction : Auteur
R. J. Strangeway
  • Fonction : Auteur
B. L. Giles
  • Fonction : Auteur

Résumé

The Magnetospheric Multiscale (MMS) mission has the primary objective of understanding the physics of the reconnection electron diffusion region (EDR), where magnetic energy is transformed into particle energy. In this poster, we present data from an EDR encounter that occurred in late December 2016 at approximately 11:00 MLT with a moderate guide field. The spacecraft were in a tetrahedral formation with an average inter-spacecraft distance of approximately 7 kilometers. During this event electron crescent-shaped distributions were observed in the electron stagnation region as is typical for asymmetric reconnection. Based on the observed ion velocity jets, the spacecraft traveled just south of the EDR. Because of the close spacecraft separation, fairly accurate computation of the Hall, electron pressure divergence, and electron inertia components of the reconnection electric field could be made. In the region of the crescent distributions good agreement was observed, with the strongest component being the normal electric field and the most significant sources being electron pressure divergence and the Hall electric field. While the strongest currents were in the out-of-plane direction, the dissipation was strongest in the normal direction because of the larger magnitude of the normal electric field component. These results are discussed in light of recent 3D PIC simulations performed by other groups.
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Dates et versions

hal-02861277 , version 1 (08-06-2020)

Identifiants

  • HAL Id : hal-02861277 , version 1

Citer

K. R. Pritchard, J. L. Burch, S. A. Fuselier, J. Webster, K. Genestreti, et al.. Small-Scale Dayside Magnetic Reconnection Analysis via MMS. AGU Fall Meeting, Dec 2017, New Orleans, Louisiane, United States. 13, 2017. ⟨hal-02861277⟩
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