On the internal structure of relativistic jets |
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Authors: | V S Beskin L M Malyshkin |
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Institution: | (1) Lebedev Physical Institute, Russian Academy of Sciences, Leninskii pr. 53, Moscow, 117924, Russia;(2) Princeton University Observatory, Princeton, USA |
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Abstract: | A magnetohydrodynamic model is constructed for a cylindrical jet embedded in an external uniform magnetic field. It is shown that, as in the force-free case, the total electric current within the jet can be zero. The particle energetics and the magnetic-field structure are determined in a self-consistent way; all jet parameters depend markedly on the physical conditions in the external medium. In particular, we show that a region with subsonic flow can exist in the central jet regions. In real relativistic jets, most of the energy is transferred by the electromagnetic field only at a sufficiently large magnetization parameter σ>106. We also show that, in general, the well-known solution with a central core B Z =B 0/(1+?2/? c 2 ) cannot be realized in the presence of an external medium. |
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Keywords: | accretion jet theory and stellar wind |
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