Whistler regime reconnection ratesNagendra Singh
Department of Electrical and Computer Engineering and CSPAR, University of Alabama - Huntsville, AL 35899, USA
received 9 December 2008; accepted in final form 3 February 2009; published February 2009
published online 9 March 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.
94.30.cp - Magnetic reconnection.
94.30.cl - Magnetotail.
94.30.ch - Magnetopause.
© EPLA 2009