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The Formation of Astrophysical Jets

Published online by Cambridge University Press:  12 April 2016

Mario Livio*
Affiliation:
Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218

Abstract

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It is assumed that the acceleration and collimation mechanisms of jets are the same in all the classes of astrophysical objects which are observed to produce jets. These classes now include: active galactic nuclei, young stellar objects, massive x-ray binaries, low mass x-ray binaries, black hole x-ray transients, symbiotic systems, planetary nebulae, and supersoft x-ray sources.

On the basis of this assumption, an attempt is made, to identify the necessary ingredients for the acceleration and collimation mechanism. It is argued that: (i) jets are produced at the center of accretion disks which are threaded by a vertical magnetic field, (ii) the production of powerful jets requires, in addition, an energy/wind source associated with the central object. Tentative explanations for the presence of jets in some classes of objects and absence in others are given. Some critical observation that can test the ideas presented in this paper are suggested.

Type
Part 16. Discussion and Conclusions
Copyright
Copyright © Astronomical Society of the Pacific 1997

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