Statistics – Computation
Scientific paper
May 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988apj...328..103l&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 328, May 1, 1988, p. 103-110. NASA-sponsored research.
Statistics
Computation
83
Accretion Disks, Active Galactic Nuclei, Gravitational Effects, Interacting Galaxies, Spiral Galaxies, Star Formation, Angular Momentum, Computational Astrophysics, Perturbation Theory, Velocity Distribution
Scientific paper
It is considered how nuclear activity in galaxies may be induced by the tidal perturbation of companion galaxies. It is suggested that if the central regions of the galaxies contain marginally self-gravitating disks of gas, trailing spiral density waves, triggered by nonaxisymmetric gravitational instability, lead to efficient angular momentum transport. If the net effect of the external perturbation is to increase the effect of self-gravity in the gas, then the result is to induce a considerable increase in the mass accretion rate into the central region on a relatively short time scale. With a simple prescription, the evolution of self-gravitating accretion disks is examined in this context. These results are discussed in the context of the frequent occurrence of nuclear activity in interacting galaxies.
Lin Doug N. C.
Pringle James E.
Rees Martin J.
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