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Permanent URL to this publication: http://dx.doi.org/10.5167/uzh-16535

Mapelli, M; Moore, B; Ripamonti, E; Mayer, L; Colpi, M; Giordano, L (2008). Are ring galaxies the ancestors of giant low surface brightness galaxies? Monthly Notices of the Royal Astronomical Society, 383(3):1223-1231.

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We simulate the collisional formation of a ring galaxy and we integrate its evolution up to 1.5 Gyr after the interaction. About 100–200 Myr after the collision, the simulated galaxy is very similar to observed ring galaxies (e.g. Cartwheel). After this stage, the ring keeps expanding and fades. Approximately 0.5–1 Gyr after the interaction, the disc becomes very large (∼100 kpc) and flat. Such extended discs have been observed only in giant low surface brightness galaxies (GLSBs). We compare various properties of our simulated galaxies (surface brightness profile, morphology, H i spectrum and rotation curve) with the observations of four well-known GLSBs (UGC 6614, Malin 1, Malin 2 and NGC 7589). The simulations match quite well the observations, suggesting that ring galaxies could be the progenitors of GLSBs. This result is crucial for the cold dark matter (CDM) model, as it was very difficult, so far, to explain the formation of GLSBs within the CDM scenario


30 citations in Web of Science®
29 citations in Scopus®
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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Institute for Computational Science
Dewey Decimal Classification:530 Physics
Uncontrolled Keywords:methods: N-body simulations • galaxies: individual: Cartwheel • galaxies: individual: Malin 1 • galaxies: individual: Malin 2 • galaxies: individual: UGC 6614 • galaxies: interactions
Date:January 2008
Deposited On:26 Feb 2009 16:19
Last Modified:05 Apr 2016 13:06
Additional Information:The definitive version is available at www.blackwell-synergy.com
Publisher DOI:10.1111/j.1365-2966.2007.12650.x
Related URLs:http://arxiv.org/abs/0710.5354

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