Astronomy and Astrophysics – Astrophysics
Scientific paper
2005-01-27
Astronomy and Astrophysics
Astrophysics
2 pages. Proceedings of the Workshop `Growing Black Holes: Accretion in a Cosmological Context', Garching, Jun. 2004
Scientific paper
We propose that the knots of the large-scale jets in powerful radio sources represent moving and separate portions of the jet matter, with the excess kinetic power. This can explain many morphological properties of quasar jets - like high knot-to-interknot brightness contrasts, frequency-independent knot profiles and almost universal extents of the knot regions - independently of the exact emission mechanisms responsible for producing broad-band jet emission. We briefly discuss a possible connection between this scenario and the idea of highly modulated/intermittent activity of the jet engine.
Begelman Mitchell C.
Ostrowski Marcin
Sikora Marcin
Stawarz Lucasz
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