Abstract
We make a numerical study of the Hall MHD reconnection process with various values of the plasma parameter β (the ratio of plasma pressure to magnetic pressure) ranging from 0.5 to 6.5. The reconnection rate ∂ A/∂ t| st in quasi-steady state is found to be in the range of 0.15 ≥ ∂A/ ∂t| st ≥ 0.095. The time series of the normal magnetic field B y and the velocity components v x & v z at selected points are transformed into power spectra via fast Fourier transform (FFT). The results show that the frequencies of the power spectra are in the range of Ω ci < ω < 8Ω ci , Ω ci being the proton cyclotron frequency. With the increase of β, the peak amplitude decreases and the peak frequency gets lower. Using the minimum variance analysis (MVA) the direction of propagation of the wave is determined. Th angle α between the wave vector k and the local magnetic field B increases with increasing β. The hodograph of the electric field E is plotted for selected points in the three calculated examples. The results of this work might provide a possible link between the fast reconnection rate and the whistler wave.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
