On the electron agyrotropy during rapid asymmetric magnetic island coalescence in presence of a guide field
Abstract 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 differ...
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| Format: | Article |
| Language: | English |
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Wiley
2016-08-01
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| Series: | Geophysical Research Letters |
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| Online Access: | https://doi.org/10.1002/2016GL070195 |
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| author | E. Cazzola M. E. Innocenti M. V. Goldman D. L. Newman S. Markidis G. Lapenta |
| author_facet | E. Cazzola M. E. Innocenti M. V. Goldman D. L. Newman S. Markidis G. Lapenta |
| author_sort | E. Cazzola |
| collection | DOAJ |
| description | Abstract 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. |
| format | Article |
| id | doaj-art-bd647c99773f4a38aec12cede60b8ede |
| institution | DOAJ |
| issn | 0094-8276 1944-8007 |
| language | English |
| publishDate | 2016-08-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geophysical Research Letters |
| spelling | doaj-art-bd647c99773f4a38aec12cede60b8ede2025-08-20T03:10:28ZengWileyGeophysical Research Letters0094-82761944-80072016-08-0143157840784910.1002/2016GL070195On the electron agyrotropy during rapid asymmetric magnetic island coalescence in presence of a guide fieldE. Cazzola0M. E. Innocenti1M. V. Goldman2D. L. Newman3S. Markidis4G. Lapenta5Department of Mathematics KULeuven University Leuven BelgiumDepartment of Mathematics KULeuven University Leuven BelgiumCenter for Integrated Plasma Studies University of Colorado Boulder Boulder Colorado USACenter for Integrated Plasma Studies University of Colorado Boulder Boulder Colorado USAPDC Center for high Performance Computing KTH Royal Institute of Technology Stockholm SwedenDepartment of Mathematics KULeuven University Leuven BelgiumAbstract 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.https://doi.org/10.1002/2016GL070195Asymmetric magnetic island coalescence with and without guide fieldElectron anisotropy and agyrotropy in asymmetric magnetic reconnectionFully kinetic simulation of asymmetric magnetic reconnection at the dayside magnetopause |
| spellingShingle | E. Cazzola M. E. Innocenti M. V. Goldman D. L. Newman S. Markidis G. Lapenta On the electron agyrotropy during rapid asymmetric magnetic island coalescence in presence of a guide field Geophysical Research Letters Asymmetric magnetic island coalescence with and without guide field Electron anisotropy and agyrotropy in asymmetric magnetic reconnection Fully kinetic simulation of asymmetric magnetic reconnection at the dayside magnetopause |
| title | On the electron agyrotropy during rapid asymmetric magnetic island coalescence in presence of a guide field |
| title_full | On the electron agyrotropy during rapid asymmetric magnetic island coalescence in presence of a guide field |
| title_fullStr | On the electron agyrotropy during rapid asymmetric magnetic island coalescence in presence of a guide field |
| title_full_unstemmed | On the electron agyrotropy during rapid asymmetric magnetic island coalescence in presence of a guide field |
| title_short | On the electron agyrotropy during rapid asymmetric magnetic island coalescence in presence of a guide field |
| title_sort | on the electron agyrotropy during rapid asymmetric magnetic island coalescence in presence of a guide field |
| topic | Asymmetric magnetic island coalescence with and without guide field Electron anisotropy and agyrotropy in asymmetric magnetic reconnection Fully kinetic simulation of asymmetric magnetic reconnection at the dayside magnetopause |
| url | https://doi.org/10.1002/2016GL070195 |
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