NGC922 - a new drop-through ring galaxy
Date
2006
Authors
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.
Journal Title
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Volume Title
Publisher
Blackwell Publishing Ltd
Abstract
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, thus making NGC 922 one of the nearest known collisional ring galaxies. While these systems are rare in the local Universe, recent deep Rubble Space Telescope images suggest they were more common in the early Universe.
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Keywords
Keywords: Galaxies: individual: NGC 922; Galaxy: structure
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Source
Monthly Notices of the Royal Astronomical Society
Type
Journal article
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Restricted until
2037-12-31
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