
TY  - JOUR
A1  - Portinari, L. 
A1  - Sommer-Larsen, J. 
A1  - Tantalo, R. 
T1  - Mass to Light Ratio, Initial Mass Function, and Chemical Evolution in&#160;Disk&#160;Galaxies
JF  - Publications of the Astronomical Society of Australia
JO  - Publ. Astron. Soc.  Aust.
Y1  - 2004
VL  - 21
IS  - 2
SP  - 144
EP  - 147
KW  - galaxies: spiral &#8212; galaxies: evolution &#8212; stars: initial mass function
UR  - https://doi.org/10.1071/AS04019 
N2  - Cosmological simulations of disk galaxy formation, when compared to the observed Tully&#8211;Fisher relation, suggest a low mass to light (M/L) ratio for the stellar component in spirals. We show that a number of &#39;bottom-light&#39; initial mass functions (IMFs) suggested independently in the literature, do imply M/L ratios as low as required, at least for late type spirals (Sbc&#8211;Sc). However the typical M/L ratio, and correspondingly the zero point of the Tully&#8211;Fisher relation, is expected to vary considerably with Hubble type.Bottom-light IMFs tend to have a metal production in excess of what is typically 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 disk galaxies. 
ER  -

