Properties and simulations of interacting spiral galaxies with transient 'ocular' shapes

Details Properties and simulations of interacting spiral galaxies with transient 'ocular' shapes Properties and simulations of interacting spiral galaxies with transient 'ocular' shapes

Apr 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991a%26a...244...52e&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 244, no. 1, April 1991, p. 52-63. Research supported by Magn. Bergvalls Stifte

Astronomy and Astrophysics

Astronomy

44

Codes, Computerized Simulation, Galactic Structure, Spiral Galaxies, Star Formation, H Alpha Line, Infrared Astronomy Satellite

Scientific paper

Computer simulations of interacting galaxies show a transient oval-apex structure resembling an eye, which sometimes leads to the formation of a permanent central bar. A dimensionless tidal strength parameter effectively distinguishes between the different possible outcomes. Several examples of ocular structure in real galaxies have been found. The rotation curves of ocular galaxies are predicted to have large velocity irregularities that correspond to distinctive spiral arm and double-parallel arm features. The amplitude of the velocity features may be useful in determining the strength of the tidal interactions.

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