The origin of lopsidedness in galaxies
| dc.creator | Mapelli, M. | |
| dc.creator | Moore, B. | |
| dc.creator | Bland-Hawthorn, J. | |
| dc.date | 2008-08-29 | |
| dc.date.accessioned | 2026-07-07T09:59:24Z | |
| dc.date.available | 2026-07-07T09:59:24Z | |
| dc.description | It has long been known that a large fraction of disc galaxies are lopsided. We simulate three different mechanisms that can induce lopsidedness: flyby interactions, gas accretion from cosmological filaments and ram pressure from the intergalactic medium. Comparing the morphologies, HI spectrum and m=1 Fourier components, we find that all of these mechanisms can induce lopsidedness in the gaseous component of disc galaxies. In particular, we estimate that flybys can contribute to ~20 per cent of lopsided galaxies. We compare our simulations with the observations of NGC 891, a lopsided, edge-on galaxy with a nearby companion (UGC 1807). We find that the main properties of NGC 891 favour a flyby event for the origin of lopsidedness in this galaxy. | |
| dc.description | 6 pages, 4 figures, to appear in "The Galaxy Disk in Cosmological Context"; Proceedings of IAU254; Copenhagen; 9-13 June 2008; eds. J. Anderson, J. Bland-Hawthorn, B. Nordstrom | |
| dc.identifier | https://arxiv.org/abs/0808.4011 | |
| dc.identifier | http://arxiv.org/abs/0808.4011 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/168010 | |
| dc.subject | Astrophysics | |
| dc.title | The origin of lopsidedness in galaxies | |
| dc.type | text |