Magnetic reconnection and cold plasma at the magnetopause

Details Magnetic reconnection and cold plasma at the magnetopause Magnetic reconnection and cold plasma at the magnetopause

Nov 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010georl..3722108a&link_type=abstract

Geophysical Research Letters, Volume 37, Issue 22, CiteID L22108

Physics

1

Magnetospheric Physics: Magnetic Reconnection (7526, 7835), Magnetospheric Physics: Magnetopause And Boundary Layers

Scientific paper

We report on detailed observations by the four Cluster spacecraft of magnetic reconnection and a Flux Transfer Event (FTE) at the magnetopause. We detect cold (eV) plasma at the magnetopause with two independent methods. We show that the cold ions can be essential for the electric field normal to the current sheet in the separatrix region at the edge of the FTE and for the associated acceleration of ions from the magnetosphere into the reconnection jet. The cold ions have small enough gyroradii to drift inside the limited separatrix region and the normal electric field can be balanced by this drift, E ≈ -v × B. The separatrix region also includes cold accelerated electrons, as part of the reconnection current circuit.

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