Permanent URL to this publication: http://dx.doi.org/10.5167/uzh-16534
Ghosh, K K; Mapelli, M (2008). UGC 7069: the largest ring galaxy. Monthly Notices of the Royal Astronomical Society, 386(1):L38-L42.
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We find that UGC 7069 is the largest ring galaxy known to date. In this Letter, we present a multiwavelength study of this galaxy (combining radio, Two-Micron All-Sky Survey, optical and ultraviolet data). The ring of UGC 7069, whose diameter measures ∼115 kpc, is also warped at its edges. The nucleus appears double-peaked and hosts a possible LINER. The ultraviolet data indicate a strong blue colour and suggest that UGC 7069 is a starburst galaxy. We also present N-body simulation results, which indicate that galaxy collisions can produce such huge rings. Large inclination angles between the target and the intruder galaxy may account for the formation of warped rings. Multiwavelength observations are highly essential to constrain our simulation results, which will address the formation and evolution of such a rare galaxy.
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|Item Type:||Journal Article, refereed, original work|
|Communities & Collections:||07 Faculty of Science > Institute for Computational Science|
|Deposited On:||06 Mar 2009 14:54|
|Last Modified:||27 Nov 2013 21:31|
|Additional Information:||The definitive version is available at www.blackwell-synergy.com|
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