Modeling the Large‐Scale Structures of Astrophysical Jets in the Magnetically Dominated Limit | Zendy

Hui Li | Zendy; Giovanni Lapenta | Zendy; John M. Finn | Zendy; Shengtai Li | Zendy; Stirling A. Colgate | Zendy

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Modeling the Large‐Scale Structures of Astrophysical Jets in the Magnetically Dominated Limit

Author(s) -

Hui Li,

Giovanni Lapenta,

John M. Finn,

Shengtai Li,

Stirling A. Colgate

Publication year - 2006

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/501499

Subject(s) - physics , magnetohydrodynamic drive , lorentz force , magnetic field , toroid , magnetohydrodynamics , limit (mathematics) , scale (ratio) , computational physics , mechanics , magnetic energy , toroidal field , plasma , classical mechanics , nuclear physics , magnetization , mathematical analysis , mathematics , quantum mechanics

We suggest a new approach that could be used for modeling both the largescale behavior of astrophysical jets and the magnetically dominated explosionsin astrophysics. We describe a method for modeling the injection of magneticfields and their subsequent evolution in a regime where the free energy ismagnetically dominated. The injected magnetic fields, along with theirassociated currents, have both poloidal and toroidal components, and they arenot force free. The dynamic expansion driven by the Lorentz force of theinjected fields is studied using 3-dimensional ideal magnetohydrodynamicsimulations. The generic behavior of magnetic field expansion, the interactionswith the background medium, and the dependence on various parameters areinvestigated.Comment: Accepted to ApJ, May 10, 2006 issue, 12 figures total (3 color figures

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