Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986asee.nasaq....b&link_type=abstract
In NASA. Marshall Space Flight Center Research Reports: 1986 NASA/ASEE Summer Faculty Fellowship Program 20 p (SEE N87-16742 08
Astronomy and Astrophysics
Astronomy
Companion Stars, Computerized Simulation, Interstellar Gas, Quasars, Seyfert Galaxies, Active Galaxies, Atmospheric Tides, Black Holes (Astronomy), Disk Galaxies, Galactic Nuclei, Spiral Galaxies
Scientific paper
Whether gravitational tides from companions trigger global instabilities in spiral galaxy disks and thus rapid flows of gas into the nucleus to fuel activity is investigated. An n-body computer program is used to simulate the disk of the spiral galaxy within a much more stable, high-velocity dispersion spherical halo. Under sufficient perturbation, the disk undergoes violent distortions due to the disturber and its self-gravitation. The tidal action of companions was simulated and the tidal strengths at which the instabilities appear to match those of the observed companions of Seyferts and quasars was shown. With the additional modifications planned, the gas flow will be more realistically simulated to compare with observations (e.g., colors, velocity fields) of active galaxies.
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