Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983mnras.202..553k&link_type=abstract
Monthly Notices of the Royal Astronomical Society, vol. 202, Feb. 1983, p. 553-560.
Astronomy and Astrophysics
Astronomy
13
Cosmic Plasma, Magnetohydrodynamic Flow, Radio Jets (Astronomy), Relativistic Plasmas, Energy Dissipation, Turbulent Jets
Scientific paper
A relativistic plasma flow can explain many of the observations on the one-sided jets, which are associated with radio sources that show super-luminal motions in their cores. The pressure from the ambient medium will communicate across the jet in a relatively short distance, typically 30 kpc. The friction between the jet and the external medium then makes the flow go turbulent. As a result the jet dissipates energy and will be brought to rest within a few hundred kpc, if it does not strike an obstacle before. The mean flow in the jet is strongly sheared and stretches the lines of force of any magnetic field frozen into the plasma. The dominant field direction, as seen from the rest frame of the plasma, is therefore parallel to the length of the jet. Polarization measurements have shown that this is in fact the case.
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