Magnetic collimation and magnetohydrodynamic kink instability driven by differential rotation

C. S. Carey, C. R. Sovinec, S. Heinz, J. E. Everett

Research output: Contribution to journalArticle

2 Scopus citations

Abstract

We investigate the launching and stability of extragalactic jets through magnetohydrodynamic simulations of jet evolution. In these simulations, a small scale equilibrium magnetic corona is twisted by a differentially rotating accretion disk. Two-dimensional calculations show the formation of a collimated outflow. This outflow is divided into two regions by the Alfvén surface: a magnetically dominated Poynting region, and a kinetically dominated region. Three-dimensional calculations show that the outflow is unstable to the m = 1 kink instability, and that the growth rate of the kink instability decreases as the rotation rate of the accretion disk increases.

Original languageEnglish (US)
Pages (from-to)1707-1713
Number of pages7
JournalInternational Journal of Modern Physics D
Volume17
Issue number10
DOIs
StatePublished - Sep 1 2008

Keywords

  • Jets and outflows
  • Magnetohydrodynamics
  • Plasmas

ASJC Scopus subject areas

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

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