A model of electromagnetic electron phase-space holes and its application
2011 (English)In: Journal of Geophysical Research, ISSN 0148-0227, Vol. 116, A11213- p.Article in journal (Refereed) Published
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.  reported electromagnetic EHs observed by the THEMIS mission in the Earth's plasma sheet. As a follow-up to Andersson et al. , this paper presents a model of electromagnetic EHs where the delta E x B(0) 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. . As an application of the model, we introduce a more accurate method than the simplified Lorentz transformation of Andersson et al.  to derive EH velocity (v(EH)). The sizes and potentials of EHs are derived from v(EH), so an accurate derivation of v(EH) is important in analyzing EHs. In general, our results are qualitatively consistent with those of Andersson et al.  but generally with smaller velocities and sizes.
Place, publisher, year, edition, pages
2011. Vol. 116, A11213- p.
IdentifiersURN: urn:nbn:se:uu:diva-164558DOI: 10.1029/2010JA016054ISI: 000297259100001OAI: oai:DiVA.org:uu-164558DiVA: diva2:468606