Stellar and Gas Dynamics of Interacting Ring Galaxies

Details Stellar and Gas Dynamics of Interacting Ring Galaxies Stellar and Gas Dynamics of Interacting Ring Galaxies

May 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993aas...182.0607g&link_type=abstract

American Astronomical Society, 182nd AAS Meeting, #06.07; Bulletin of the American Astronomical Society, Vol. 25, p.798

Astronomy and Astrophysics

Astronomy

1

Scientific paper

The development of ring and arc structure following the collision between of a spherical galaxy and a disk galaxy is studied with a combined N-body/smoothed particle hydrodynamics numerical code. It is found that off-center collisions normal to the disk plane between equal mass galaxies produce greater gas density enhancements in the non-nuclear portion of the disk when compared to an equivalent axisymmetric collision. Strong gas interactions cause the stellar and gaseous components of the disk to decouple. If star formation is associated with the strongest gas shocks, the observed morphology of collisionally produced ring galaxies is strongly influenced by large-scale gas dynamical processes. Comparison of the models to a number of observed systems indicates that this may be the case.

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