Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 1997
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997mnras.284..899n&link_type=abstract
Monthly Notices of the Royal Astronomical Society, Volume 284, Issue 4, pp. 899-910.
Astronomy and Astrophysics
Astronomy
7
Mhd, Relativity, Pulsars: General, Ism: Jets And Outflows, Galaxies: Active.
Scientific paper
A non-force-free cylindrical equilibrium of the magnetically driven relativistic MHD flows is investigated as a model of astrophysical jets. We present a model in which the magnetosphere has a hybrid asymptotic structure: the polar region and the lower latitude region are filled with the cylindrical jet and the conical wind, respectively. The conical wind was investigated by myself in a previous paper. Here we investigate the cylindrical jet at finite cylindrical radius. In this case, the inertial force is important for the force balance. In the polar region, the force-balance equation is reduced to a single second- order ordinary differential equation. This reduced equation is numerically solved, and typical solutions having the following properties are obtained. These solutions indicate self-organized structure, i.e. the solutions fill the entire polar region with finite magnetic flux, and need no external pressure for confinement. The current distribution is completely regular. This cylindrical jet is composed of the cylindrical core with a scale similar to that of the light cylinder, and the ambient cylindrical envelope, which extends to infinite cylindrical radius. The collimation of the core is governed by four parameters (the terminal velocity, the angular momentum, the angular velocity of the field lines and the injection rate).
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