Star formation efficiency
NIR + optical
- Star formation past and present
HIPASS (HI)
- remaining fuel ? star formation future
- failed star formation
- SF efficiency as a function of environment
- density-morphology relation (Dressler 1980): decrease in % of late-type (SF) galaxies in regions of high galaxy density
- test models of the density-morphology relation using data not biased by current star formation
HI total HI ?V HI velocity