On the Internal Structure of Relativistic Jets

Details On the Internal Structure of Relativistic Jets On the Internal Structure of Relativistic Jets

2000-06-08

arxiv.org/abs/astro-ph/0006105v2

Astron.Lett. 26 (2000) 208-218

Astronomy and Astrophysics

Astrophysics

19 pages, 2 figures

Scientific paper

10.1134/1.20384

A magnetohydrodynamic model is constructed for a cylindrical jet immersed 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 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 actual relativistic jets, most of the energy is transferred by the electromagnetic field only when the magnetization parameter is sufficiently large, $\sigma>10^6$. We also show that, in general, the well-known solution with a central core, $B_z = B_0/(1+\varpi^2/\varpi_c^2)$, can not be realized in the presence of an external medium.

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