A model of electromagnetic electron phase-space holes and its application
| Autor: | David Newman, Wolfgang Baumjohann, Vassilis Angelopoulos, H. U. Auster, Alain Roux, O. LeContel, John W. Bonnell, Davin Larson, Robert E. Ergun, J. P. McFadden, Martin V. Goldman, Christopher Cully, Laila Andersson, Karl-Heinz Glassmeier, J. Tao |
|---|---|
| Rok vydání: | 2011 |
| Předmět: |
Shock wave
Atmospheric Science 010504 meteorology & atmospheric sciences Lorentz transformation Soil Science Electron Aquatic Science Oceanography Space (mathematics) 01 natural sciences symbols.namesake Geochemistry and Petrology Quantum mechanics 0103 physical sciences Earth and Planetary Sciences (miscellaneous) 010306 general physics 0105 earth and related environmental sciences Earth-Surface Processes Water Science and Technology Physics Ecology Mathematics::Complex Variables Plasma sheet Paleontology Forestry Plasma Nonlinear system Geophysics Space and Planetary Science Phase space Quantum electrodynamics symbols |
| Zdroj: | Journal of Geophysical Research: Space Physics. 116 |
| ISSN: | 0148-0227 |
| DOI: | 10.1029/2010ja016054 |
| Popis: | [1] Electron phase-space holes (EHs) are indicators of nonlinear activities in space plasmas. Most often they are observed as electrostatic signals, but recently Andersson et al. [2009] reported electromagnetic EHs observed by the THEMIS mission in the Earth's plasma sheet. As a follow-up to Andersson et al. [2009], this paper presents a model of electromagnetic EHs where the δE × B0 drift of electrons creates a net current. The model is examined with test-particle simulations and compared to the electromagnetic EHs reported by Andersson et al. [2009]. As an application of the model, we introduce a more accurate method than the simplified Lorentz transformation of Andersson et al. [2009] to derive EH velocity (vEH). The sizes and potentials of EHs are derived from vEH, so an accurate derivation of vEH is important in analyzing EHs. In general, our results are qualitatively consistent with those of Andersson et al. [2009] but generally with smaller velocities and sizes. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Plný text