Three-dimensional simulations of the Parker instability in a uniformly-rotating disk

Jongsoo Kim, Dongsu Ryu, Thomas W Jones

Research output: Contribution to journalConference articlepeer-review

Abstract

We investigate the nonlinear effects of uniform rotation on the Parker instability in an exponentially-stratified disk through high-resolution simulations. During the linear stage, the speed of gas motion is subsonic and the evolution with the rotation is not much different from that without the rotation. This is because the Coriolis force is small. During the nonlinear stage, oppositely-directed supersonic flows near a magnetic valley are under the influence of the Coriolis force with different directions, resulting in twisted magnetic field lines near the valley. Sheet-like structures, which are tilted with respect to the initial field direction, are formed with an 1.5 enhancement of column density with respect to its initial value. Even though uniform rotation doesn't give much impact on density enhancement, it generates helically twisted field lines, which may become an additional support mechanism of clouds.

Original languageEnglish (US)
Pages (from-to)77-79
Number of pages3
JournalRevista Mexicana de Astronomia y Astrofisica: Serie de Conferencias
Volume9
StatePublished - Dec 1 2000
EventAstrophysical Plasmas: Codes, Models, and Observations - Mexico City, Mexico
Duration: Oct 25 1999Oct 29 1999

Keywords

  • Instabilities
  • ISM: clouds
  • ISM: magnetic fields
  • ISM: structure
  • MHD

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