# Star Formation Rate

1. Jul 31, 2012

### Sagar_C

How does one analytically estimate star formation rate in a plasma cloud? Could someone lead me to original references? Kennicutt-Schmidt Law, I guess, is empirical.

2. Aug 15, 2012

### zhermes

I'm not familiar with any work that does this in more than order of magnitude sense. The general idea is to estimate the star formation rate as the molecular-gas infall rate - with some efficiency factor, e.g.

$$\rm{SFR} \sim \epsilon \cdot M_{H} \cdot t_\rm{dyn}^{-1}$$

Where $\epsilon$ is the efficiency factor (maybe ~0.1), and $t_\rm{dyn}$ is the dynamical time.