Simulations of Electron Magnetohydrodynamic Turbulence

Details Simulations of Electron Magnetohydrodynamic Turbulence Simulations of Electron Magnetohydrodynamic Turbulence

2009-04-03

arxiv.org/abs/0904.0661v2

Astrophys.J.701:236-252,2009

Astronomy and Astrophysics

Astrophysics

Earth and Planetary Astrophysics

ApJ, accepted; 19 pages, 14 figures (corrections + new calculations added)

Scientific paper

10.1088/0004-637X/701/1/236

We present numerical simulations of electron magnetohydrodynamic (EMHD) and electron reduced MHD (ERMHD) turbulence. Comparing scaling relations, we find that both EMHD and ERMHD turbulence show similar spectra and anisotropy. We develop new techniques to study anisotropy of EMHD turbulence. Our detailed study of anisotropy of EMHD turbulence supports our earlier result of k_par ~ k_perp^(1/3) scaling. We find that the high-order statistics show a scaling that is similar to the She-Leveque scaling. We observe that the bispectra, which characterize the interaction of different scales within the turbulence cascade, are very different for EMHD and MHD turbulence. We show that both decaying and driven EMHD turbulence have the same statistical properties. We calculate the probability distribution functions (PDFs) of MHD and EMHD turbulence and compare them with those of interplanetary turbulence. We find that, as in the case of the solar wind, the PDFs of the increments of magnetic field strength in MHD and EMHD turbulence are well described by the Tsallis distribution. We discuss implications of our results for astrophysical situations, including the ADAFs and magnetic reconnection.

Affiliated with

Also associated with

No associations

Rating

Simulations of Electron Magnetohydrodynamic Turbulence does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Simulations of Electron Magnetohydrodynamic Turbulence, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Simulations of Electron Magnetohydrodynamic Turbulence will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-122875