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Collisional Ring Galaxies

Published online by Cambridge University Press:  25 May 2016

P.N. Appleton
P.N. Appleton*
Affiliation:
Department of Physics and Astronomy, Iowa State University, Ames, IA 50011, USA

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Ring galaxies are believed to represent a special case of a collision between two galaxies, in which one of the galaxies impacts and passes through the center of another disk system (e.g. Lynds & Toomre 1976). Although rare, this kind of low orbital-angular-momentum collision leads to a recognizable structure, namely a luminous blue star-forming ring (Appleton & Marston 1997), which should be easily identifiable even at moderate redshift. Indeed, Lavery et al. (1996) have used this fact, and their relative rarity at low-redshift, to conclude that rings (and therefore presumably all collisions) are over-represented in deep HST fields.

Type
Tidal Interactions
Information
Symposium - International Astronomical Union , Volume 186: Galaxy Interactions at High and Low Redshift , 1999 , pp. 97 - 104
Copyright
Copyright © Kluwer 1999 

References

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