Astronomy and Astrophysics – Astrophysics
Scientific paper
Jun 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000aipc..522..275l&link_type=abstract
COSMIC EXPLOSIONS: Tenth Astrophysics Conference. AIP Conference Proceedings, Volume 522, pp. 275-297 (2000).
Astronomy and Astrophysics
Astrophysics
19
Hydrodynamics, Jets And Bursts, Galactic Winds And Fountains, Jets, Outflows And Bipolar Flows, Active And Peculiar Galaxies And Related Systems
Scientific paper
I show that the assumption that the acceleration and collimation mechanisms of jets are the same in all the classes of astrophysical objects which are observed to produce jets, can lead to interesting conclusions. Jets have now been observed in: 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, and possibly recurrent novae and pulsars. An attempt is made to identify the necessary ingredients for the acceleration and collimation mechanisms. I show that most likely: (i) jets are produced at the center of accretion disks, and are accelerated and collimated hydromagnetically, (ii) the production of powerful jets may require a hot corona or access to an additional heat/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. .
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