Issue
EPL
Volume 85, Number 4, February 2009
Article Number 49001
Number of page(s) 6
Section Geophysics, Astronomy and Astrophysics
DOI http://dx.doi.org/10.1209/0295-5075/85/49001
Published online 18 February 2009
EPL, 85 (2009) 49001
DOI: 10.1209/0295-5075/85/49001

Auroral evidence for multiple reconnection in the magnetospheric tail plasma sheet

R. A. Treumann1, 2, C. H. Jaroschek3 and R. Pottelette4

1   Department of Geophysics, Munich University - Theresienstr. 41, D-80333 Munich, Germany, EU
2   Department of Physics and Astronomy, Dartmouth College - Hanover, NH 03755, USA
3   Department of Earth and Planetary Sciences, Tokyo University - Tokyo, Japan
4   CETP/CNRS - St.-Maur-des-Fossés Cedex, France, EU


received 1 November 2008; accepted in final form 28 January 2009; published February 2009
published online 18 February 2009

Abstract
We present auroral evidence for multiple and, most probably, small-scale reconnection in the near-Earth magnetospheric plasma sheet current layer during auroral activity. Hall currents as the source of upward and downward field-aligned currents require the generation of the corresponding electron fluxes. The auroral spatial ordering in a multiple sequence of these fluxes requires the assumption of the existence of several —and possibly— even many tailward reconnection sites.

PACS
94.30.Aa - Auroral phenomena in magnetosphere.
94.30.cp - Magnetic reconnection.
94.20.wj - Wave/particle interactions.

© EPLA 2009