Other
Scientific paper
Jan 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980apj...235..421m&link_type=abstract
Astrophysical Journal, Part 1, vol. 235, Jan. 15, 1980, p. 421-436.
Other
60
Astronomical Models, Collision Parameters, Galactic Structure, Interacting Galaxies, Stellar Motions, Angular Momentum, Energy Transfer, Many Body Problem, Orbit Calculation
Scientific paper
Collisions of spherical galaxies were studied in a series of numerical experiments to see what happens when galaxies collide. Each experiment starts with two model galaxies, each consisting of 50,000 stars, moving toward each other along a specified orbit. The series of experiments provides a systematic sampling of the parameter space spanned by the initial orbital energy and the initial angular momentum. Deeply penetrating collisions are emphasized. The collisions reported here scale to relative velocities as great as 500 km/s, well into the range for collisions within clusters of galaxies. It is found that: (1) the galaxies contract momentarily to about half their original sizes shortly after close passage; and (2) the initial galaxies blend into a single dynamical system while they are near each other.
Miller Richard H.
Smith Barbara F.
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