Star formation efficiency (SFE) is defined via
where
is the
star formation rate and
is the mass of neutral hydrogen in the galaxy (see e.g.
[1])
References:- [1]^ D. Schiminovich, B. Catinella, G. Kauffmann, S. Fabello, J. Wang, C. Hummels, J. Lemonias and S. M. Moran et al., ``The GALEX Arecibo SDSS Survey II: The Star Formation Efficiency of Massive Galaxies,'' Mon. Not. Roy. Astron. Soc. 408 (2010) 919 [arXiv:1006.5447 [astro-ph.CO]].