Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981plap.rept..267r&link_type=abstract
In ESA Plasma Astrophys. p 267-271 (SEE N82-20030 10-88)
Astronomy and Astrophysics
Astronomy
Beam Currents, Black Holes (Astronomy), Extragalactic Radio Sources, Galactic Structure, Plasma Jets, Active Galactic Nuclei, Collimation, Quasars, Relativistic Electron Beams, Symmetry
Scientific paper
The processes in active galactic nuclei which give rise to the large-scale jet structures in radio galaxies are dealt with. The physical conditions in beam plasma and the initial collimation are treated. Collimated jets are set up within a few parsecs of a massive black hole. Jet physics show that the large-scale radio structures are influenced by the galactic and extragalactic environment. The energy densities are low; the speeds are probably not relativistic. Even though the physics is not extreme, large-scale source morphology is comparable to computational meteorology for complexity. Primary energy production seems easier to understand, even though it entails more extreme conditions, e.g., relativistic flows, black holes. The crucial processes may be quite symmetric and thus more amenable to serious modelling.
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