Title: Bipolar electric field signatures of reconnection separatrices for a hydrogen plasma at realistic guide fields
Authors: Lapenta, Giovanni ×
Markidis, Stefano
Newman, D.L.
Divin, Andrey
Goldman, M.V. #
Issue Date: 7-Sep-2011
Publisher: American Geophysical Union
Series Title: Geophysical Research Letters vol:38
Article number: L17104
Abstract: In preparation for theMMSmission we ask the question:
how common are bipolar signatures linked to the presence of
electron holes along separatrices emanating from reconnection regions? To answer this question, we conduct massively parallel simulations for realistic conditions and for the hydrogen mass ratio in boxes larger than considered in similar previous studies. The magnetic field configuration includes both a field reversal and an out of plane guide field, as typical of many space situations. The guide field is varied in strength from low values (typical of the Earth magnetotail) to high values comparable to the inā€plane reconnecting field (as in the magnetopause). In all cases, along the separatrices a strong electron flow is observed, sufficient to lead to the onset of streaming instabilities and to form bipolar parallel electric
field signatures. The presence of bipolar structures at all guide fields allows the control of the MMS mission to consider the presence of bipolar signatures as a general flag of the presence of a nearby reconnection site both in the nightside and in the dayside of the magnetosphere.
ISSN: 0094-8276
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Plasma-astrophysics Section
× corresponding author
# (joint) last author

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