Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aps..aprb17103l&link_type=abstract
American Physical Society, April Meeting, Jointly Sponsored with the High Energy Astrophysics Division (HEAD) of the American As
Astronomy and Astrophysics
Astrophysics
Scientific paper
In disk galaxy collisions both the stars and gas experience strong gravitational forces that propel the material inward and then out to large distances from the central regions. At the same time, the coupling between this radial motion and the excess azimuthal velocity, caused by capture of angular momentum from the orbits of the galaxies, produces stellar orbit crossing and shocks in the gas. The resulting 3-D velocity structure is highly disturbed, even in the disks that often form rapidly in the centers of such systems. We use the results of our N-body/SPH simulations of collisions between two disk galaxies to explore some of these velocity disturbances, and we demonstrate how they affect line-of-sight velocities for some real colliding systems. We acknowledge support from NASA 0-1166B and DOE LLNL B506657
Hearn Nathan C.
Lamb Susan A.
Morgan John P.
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