The search result changed since you submitted your search request. Documents might be displayed in a different sort order.
  • search hit 2 of 2
Back to Result List

Magnetic-field amplification by turbulence in a relativistic shockpropagating through an inhomogeneous medium

  • We perform two-dimensional relativistic magnetohydrodynamic simulations of a mildly relativistic shock propagating through an inhomogeneous medium. We show that the postshock region becomes turbulent owing to preshock density inhomogeneity, and the magnetic field is strongly amplified due to the stretching and folding of field lines in the turbulent velocity field. The amplified magnetic field evolves into a filamentary structure in two-dimensional simulations. The magnetic energy spectrum is flatter than the Kolmogorov spectrum and indicates that a so-called small-scale dynamo is occurring in the postshock region. We also find that the amount of magnetic-field amplification depends on the direction of the mean preshock magnetic field, and the timescale of magnetic-field growth depends on the shock strength.

Export metadata

Additional Services

Search Google Scholar Statistics
Metadaten
Author details:Yosuke Mizuno, Martin PohlORCiDGND, Jacek Niemiec, Bing Zhang, Ken-Ichi Nishikawa, Philip E. Hardee
DOI:https://doi.org/10.1088/0004-637X/726/2/62
ISSN:0004-637X
Title of parent work (English):The astrophysical journal : an international review of spectroscopy and astronomical physics
Publisher:IOP Publ. Ltd.
Place of publishing:Bristol
Publication type:Article
Language:English
Year of first publication:2011
Publication year:2011
Release date:2017/03/26
Tag:gamma-ray burst: general; magnetohydrodynamics (MHD); methods: numerical; relativistic processes; shock waves; turbulence
Volume:726
Issue:2
Number of pages:11
Funding institution:NSF [AST-0506719, AST-0506666, AST-0908010, AST-0908040, AST-0908362]; NASA [NNG05GK73G, NNX07AJ88G, NNX08AG83G, NNX09AT66G, NNX10AD48G]; MNiSW [N N203 393034]; Foundation for Polish Science through the EEA Financial Mechanism; Altix3700 BX2 at YITP in Kyoto University
Organizational units:Mathematisch-Naturwissenschaftliche Fakultät / Institut für Physik und Astronomie
Peer review:Referiert
Accept ✔
This website uses technically necessary session cookies. By continuing to use the website, you agree to this. You can find our privacy policy here.