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On the electron agyrotropy during rapid asymmetric magnetic island coalescence in presence of a guide field

Cazzola, E, Innocenti, ME, Goldman, MV, Newman, DL, Markidis, S and Lapenta, G (2016) On the electron agyrotropy during rapid asymmetric magnetic island coalescence in presence of a guide field Geophysical Research Letters, 43 (15). pp. 7840-7849.

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We present an analysis of the properties of the electron velocity distribution during island coalescence in asymmetric reconnection with and without guide field. In a previous study, three main domains were identified, in the case without guide field, as X, D, and M regions featuring different reconnection evolutions. These regions are also identified here in the case with guide field. We study the departure from isotropic and gyrotropic behavior by means of different robust detection algorithms proposed in the literature. While in the case without guide field these metrics show an overall agreement, when the guide field is present, a discrepancy in the agyrotropy within some relevant regions is observed, such as at the separatrices and inside magnetic islands. Moreover, in light of the new observations from the Multiscale MagnetoSpheric mission, an analysis of the electron velocity phase-space in these domains is presented.

Item Type: Article
Subjects : Mathematics
Divisions : Faculty of Engineering and Physical Sciences > Mathematics
Authors :
Innocenti, ME
Goldman, MV
Newman, DL
Markidis, S
Lapenta, G
Date : 16 August 2016
DOI : 10.1002/2016GL070195
Copyright Disclaimer : ©2016. American Geophysical Union. All Rights Reserved.
Uncontrolled Keywords : High-performance Computing, Magnetic Reconnection, Magnetopause and Boundary Layers, Numerical Modeling, Space Weather
Depositing User : Symplectic Elements
Date Deposited : 17 May 2017 13:56
Last Modified : 04 Dec 2019 15:21

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