Astronomy and Astrophysics – Astronomy
Scientific paper
Mar 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990a%26a...229..416l&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 229, no. 2, March 1990, p. 416-423. Research supported by NSERC.
Astronomy and Astrophysics
Astronomy
2
Active Galactic Nuclei, Black Holes (Astronomy), Early Stars, Jet Flow, Mass Flow, Stellar Cores, Angular Momentum, Cross Sections, Gravitational Collapse, Relativistic Theory
Scientific paper
The motion of adiabatic jets propagating along the symmetry axis of a Kerr black hole is studied in the case where the outflowing matter possesses angular momentum. A simple parameterization is used for the cross-sectional area of the jets, and the results applied to conical and paraboloidal jets. Inclusion of angular momentum in the outflowing material has the effect of shifting the critical point inward closer to the black hole, thus contributing to the radial acceleration of the flow. When the black hole is rotating, this inward shift is more pronounced for direct flows than retrograde ones: for a maximally rotating Kerr hole, the relative shift (with respect to a Schwarzschild black hole) varies from about 12 to 30 percent. Rotation in the outflowing matter has the effect of reducing the mass outflow rate.
Lu Ju-Fu
Pineault Serge
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