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NGC922 - a new drop-through ring galaxy

Wong, O. I.; Meurer, Gerhardt; Bekki, Kenji; Kennicutt, R. C.; Bland-Hawthorn, Joss; Ryan-Weber, E. V.; Koribalski, Baerbel S.; Kilborn, Virginia A.; Putman, Mary E.; Heiner, J. S.; Allen, R. J.; Dopita, Michael; Doyle, Marianne T.; Freeman, Kenneth; Knezek, Patricia M.; Seibert, M.; Smith, R. Chris; Zwaan, M. A.


We have found the peculiar galaxy NGC 922 to be a new drop-through ring galaxy using multiwavelength (ultraviolet-radio) imaging and spectroscopic observations. Its 'C'-shaped morphology and tidal plume indicate a recent strong interaction with its companion which was identified with these observations. Using numerical simulations we demonstrate that the main properties of the system can be generated by a high-speed off-axis drop-through collision of a small galaxy with a larger disc system,...[Show more]

CollectionsANU Research Publications
Date published: 2006
Type: Journal article
Source: Monthly Notices of the Royal Astronomical Society
DOI: 10.1111/j.1365-2966.2006.10589.x


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