Instabilities in two-fluid magnetized media with inter-component drift |
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| Authors: | P V Tytarenko R J R Williams S A E G Falle |
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| Institution: | Department of Applied Mathematics, University of Leeds, Leeds LS2 9JT;Astronomical Observatory of Kyiv Shevchenko University, 3 Observatorna St., Kiev 04053, Ukraine;Department of Physics and Astronomy, Cardiff University, PO Box 913, Cardiff CF24 3YB |
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| Abstract: | We analyse the stability of a magnetized medium consisting of a neutral fluid and a fluid of charged particles, coupled to each other through a drag force and exposed to differential body forces (for example, as the result of radiation forces on one phase). We consider a uniform equilibrium and simple model input physics, but do not arbitrarily restrict the relative orientations of the magnetic field, slip velocity and wavevector of the disturbance. We find several instabilities and classify these in terms of wave resonances. We briefly apply our results to the structure of SiO maser regions appearing in the winds from late-type stars. |
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| Keywords: | instabilities MHD stars: winds outflows ISM: clouds dust extinction ISM: kinematics and dynamics |
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