Current-driven kink instability in relativistic jets

Yosuke Mizuno, Philip E. Hardee, Yuri Lyubarsky, Ken Ichi Nishikawa

Research output: Contribution to journalArticlepeer-review


We have investigated the development of current-driven (CD) kink instability in relativistic jets via 3D RMHD simulations. In this investigation a static force-free equilibrium helical magnetic configuration is considered in order to study the influence of the initial configuration on the linear and nonlinear evolution of the instability. We found that the initial configuration is strongly distorted but not disrupted by the CD kink instability. The linear growth and nonlinear evolution of the CD kink instability depend moderately on the radial density profile and strongly on the magnetic pitch profile. Kink amplitude growth in the nonlinear regime for decreasing magnetic pitch leads to a slender helically twisted column wrapped by magnetic field. On the other hand, kink amplitude growth in the nonlinear regime nearly ceases for increasing magnetic pitch.

Original languageEnglish
Pages (from-to)683-688
Number of pages6
JournalInternational Journal of Modern Physics D
Issue number6
StatePublished - 1 Jun 2010


  • Relativistic jets
  • instabilities
  • magnetohydrodynamics

ASJC Scopus subject areas

  • Mathematical Physics
  • Astronomy and Astrophysics
  • Space and Planetary Science


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