Issue |
EPL
Volume 85, Number 4, February 2009
|
|
---|---|---|
Article Number | 49003 | |
Number of page(s) | 5 | |
Section | Geophysics, Astronomy and Astrophysics | |
DOI | https://doi.org/10.1209/0295-5075/85/49003 | |
Published online | 09 March 2009 |
Whistler regime reconnection rates
Department of Electrical and Computer Engineering and CSPAR, University of Alabama - Huntsville, AL 35899, USA
Corresponding author: singh@ece.uah.edu
Received:
9
December
2008
Accepted:
3
February
2009
Based on whistler mode group velocity cones radiated by electromagnetic perturbations (EMPs) in the diffusion region, we predict the magnetic reconnection rates R as a function of the half-width w of the current sheet in the diffusion region. Since an EMP in the diffusion region has a finite width transverse to the ambient magnetic field, its perpendicular wave number () spectrum also has a finite width. We first give the rates (R) for monochromatic (discrete) values of proportional to w-1. Such rates are used to determine the rates averaged over the wave-number spectrum of a Gaussian-shaped EMP. We compare the predictions on R with results from numerical simulations and satellite observations, showing remarkable agreement.
PACS: 94.30.cp – Magnetic reconnection / 94.30.cl – Magnetotail / 94.30.ch – Magnetopause
© EPLA, 2009
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