Mass-to-Light ratio, Initial Mass Function and chemical evolution in disc galaxies
| dc.creator | Portinari, L. | |
| dc.creator | Sommer-Larsen, J. | |
| dc.creator | Tantalo, R. | |
| dc.date | 2004-02-18 | |
| dc.date.accessioned | 2026-07-07T02:12:20Z | |
| dc.date.available | 2026-07-07T02:12:20Z | |
| dc.description | Cosmological simulations of disc galaxy formation, when compared to the observed Tully-Fisher relation, suggest a low Mass-to-Light (M/L) ratio for the stellar component in spirals. We show that a number of "bottom-light" Initial Mass Functions (IMFs) suggested independently in literature, do imply M/L ratios as low as required, at least for late type spirals (Sbc/Sc). However the typical M/L ratio, and correspondingly the zero-point of the Tully-Fisher relation, is expected to vary considerably with Hubble type. Bottom-light IMFs tend to have a metal production in excess of what is tipically estimated for spiral galaxies. Suitable tuning of the IMF slope and mass limits, post-supernova fallback of metals onto black holes or metal outflows must then be invoked, to reproduce the observed chemical properties of disc galaxies. | |
| dc.description | 4 pages, 6 colour figures. To appear on PASA (refereed proceedings of Galactic ChemoDynamics V, B.K. Gibson and D. Kawata eds.) | |
| dc.identifier | https://arxiv.org/abs/astro-ph/0402427 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/0402427 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/7415 | |
| dc.subject | Astrophysics | |
| dc.title | Mass-to-Light ratio, Initial Mass Function and chemical evolution in disc galaxies | |
| dc.type | text |