The efficiency per free-fall time as a ratio of the Star Formation Rate to the gas-infall rate in collapsing cores: dependence on the core definition, accretion, and radial structure

Fabián Quesada-Zúñiga, Manuel Zamora-Avilés, Enrique Vázquez-Semadeni +3

A parameter used to characterise star formation activity in MCs is the efficiency per free-fall time, ${\epsilon }_{\mathrm{ff}}$, although commonly referred to as an efficiency, it is formally t…