Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991pasj...43..131f&link_type=abstract
Astronomical Society of Japan, Publications (ISSN 0004-6264), vol. 43, no. 1, 1991, p. 131-145.
Astronomy and Astrophysics
Astronomy
4
Magnetic Field Configurations, Magnetohydrodynamic Flow, Plasma-Electromagnetic Interaction, Radio Jets (Astronomy), Accretion Disks, Active Galactic Nuclei, Astronomical Models, Magnetoacoustics, Toroidal Plasmas
Scientific paper
This paper examines steady, wind-type MHD jets accelerated in a funnel formed along the rotational axis of a geometrically thick torus around a central object. When the mass and magnetic field are injected from only the base of the jets, the magnetic pressure of the toroidal magnetic fields accelerates the gas, whereas the magnetic tension decelerates it as long as the cross-sectional area of the jets increases. In the present case, the locations of the transmagnetosonic points of jet flow are determined by the thermal properties of the flow and are independent of the magnetic properties. Transmagnetosonic points shift to infinity in the cold limit. When the mass and magnetic field injections from the funnel wall are taken into account, transmagnetosonic points are located at larger distances than the scale length of mass injection. It was found that the injection of magnetic fields from the funnel wall enhances the acceleration of jets.
Fukue Jun
Okada Rika
Shibata Kazunari
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