A collisional model for the formation of ripples in early-type disk galaxies

Details A collisional model for the formation of ripples in early-type disk galaxies A collisional model for the formation of ripples in early-type disk galaxies

Dec 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988aj.....96.1850w&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 96, Dec. 1988, p. 1850-1860.

Statistics

Computation

17

Computational Astrophysics, Disk Galaxies, Galactic Evolution, Three Body Problem, Charge Coupled Devices, Galactic Structure, Morphology, Perturbation Theory, Ripples

Scientific paper

The authors use restricted three-body calculations of high-inclination, low-impact-parameter encounters to argue that the shell-like ripples observed in a number of disk galaxies are collisional artifacts. Specifically, they propose that some of the ripples may be the result of internal oscillations following such an encounter, much as in ring galaxies. The recent multicolor surface photometry of Schombert and Wallin (1987) indicates that Arp 227 may be an example of this ripple-formation process. The appearance of Arp 178 matches the models even more remarkably. A number of the Malin and Carter (1983) shells in disk systems might also be explained by these models.

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