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How Can Jets Survive MHD Instabilities? |
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| Authors: | Hubert Baty Rony Keppens Pierre Comte |
| Institution: | 1. Observatoire Astronomique, 11 Rue de l'université, Strasbourg, France 2. Association Euratom/FOM, FOM-Institute for Plasma Physics Rijnhuizen, P.O. Box 1207, BE, Nieuwegein, The Netherlands 3. Institut de mécanique des fluides, 2 Rue Boussingault, Strasbourg, France |
| Abstract: | We present the main findings of two recent studies using high-resolution MHD simulations of supersonic magnetized shear flow layers. First, a strong large-scale coalescence effect partially countered by small-scale reconnection events is shown to dominate the dynamics in a two-dimensional layer subject to Kelvin-Helmholtz (KH) instabilities. Second, an interaction mechanism between two different types of instabilities (KH and current-driven modes) is shown to occur in a cylindrical jet configuration embedded in an helical magnetic field. Finally, we discuss the implications of these results for astrophysical jets survival. |
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