DUVET: sub-kiloparsec resolved star formation driven outflows in a sample of local starbursting disk galaxies

We measure resolved (kiloparsec-scale) outflow properties in a sample of 10 starburst galaxies from the DUVET sample, using Keck/KCWI observations of Hβ and [OIII] λ5007. We measure ∼450 lines-of-sight that contain outflows, and use these to study scaling relationships of outflow velocity (v_ out), mass-loading factor (η; mass outflow rate per SFR) and mass flux (Σ̇_ out; mass outflow rate per area) with co-located SFR surface density (Σ_ SFR) and stellar mass surface density (Σ_∗). We find strong, positive correlations of Σ̇_ out∝Σ_ SFR^1.2 and Σ̇_ out∝Σ_∗^1.7. We also find shallow correlations between v_ out and both Σ_ SFR and Σ_∗. Our resolved observations do not suggest a threshold in outflows with Σ_ SFR, but rather we find that the local specific SFR (Σ_ SFR/Σ_∗) is a better predictor of where outflows are detected. We find that outflows are very common above Σ_ SFR/Σ_∗≳ 0.1 Gyr^-1 and rare below this value. We argue that our results are consistent with a picture in which outflows are driven by supernovae, and require more significant injected energy in higher mass surface density environments to overcome local gravity. The correlations we present here provide a statistically robust, direct comparison for simulations and higher redshift results from JWST.