Distant encounters between disk galaxies and the origin of S 0 spirals

Details Distant encounters between disk galaxies and the origin of S 0 spirals Distant encounters between disk galaxies and the origin of S 0 spirals

Mar 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985a%26a...144..115i&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 144, no. 1, March 1985, p. 115-123. Research supported by the University of Mi

Statistics

Computation

101

Celestial Mechanics, Computational Astrophysics, Disk Galaxies, Gas Transport, Spiral Galaxies, Density Distribution, Gravitational Effects, Hydrodynamics, Interstellar Gas, Perturbation, Velocity Distribution

Scientific paper

Numerical calculations of the hydrodynamics of a gaseous disk in a galaxy perturbed by an intruder flying in a hyperbolic orbit are presented. It is shown that if the pericenter of the distance between the galaxy and the intruder object becomes so large that stellar bridges and tails become unimportant, gravitational shocks may occur. It is suggested that the theoretical calculations may help explain the physical mechanisms of S 0 spiral galaxy formation. Computer-generated illustrations of the numerical results are provided.

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