Abstract
Variability in the radio waveband and moving features detected by VLBI observations are commonly explained in terms of shocks moving in relativistic collimated flows. We discuss the origin of these jets with their relation to the magnetic structure of accretion disks. Dynamo action in the disk creates a rotating magnetosphere which is filled with disk-plasma. Along open flux tubes, the plasma is accelerated to relativistic speeds and collimated outside the light cylinder of the magnetosphere. The relaxation of these newly formed jets towards a minimal energy equilibrium is the origin for strong X-ray emission, ejection of knots along the jets and rapid variability in X-rays and the infrared-optical region.
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Camenzind, M. (1991). Relativistic jet models and variable knot emission. In: Duschl, W.J., Wagner, S.J., Camenzind, M. (eds) Variability of Active Galaxies. Lecture Notes in Physics, vol 377. Springer, Berlin, Heidelberg. https://doi.org/10.1007/BFb0030061
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DOI: https://doi.org/10.1007/BFb0030061
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