Cloud-scale Gas Properties, Depletion Times, and Star Formation Efficiency per Freefall Time in PHANGS-ALMA
We compare measurements of star formation efficiency to cloud-scale gas properties across the PHANGS- ALMA sample. Dividing 67 galaxies into 1.5 kpc scale regions, we calculate the molecular gas depletion time τ dep mol = Σ mol / Σ SFR and the star formation efficiency per freefall time ϵ ff mol = τ ff / τ dep mol for each region. Then we test how τ dep mol and ϵ ff mol vary as functions of the re