Speaker
Description
Outflowing gas driven by star formation plays a critical role within the baryon cycle. However the details of this stellar feedback process are still unclear, particularly in starbursting environments. To better constrain the feedback models used to understand galaxy evolution, high resolution IFU observations are needed to spatially resolve star formation-driven outflow properties and link these to co-located galaxy properties. I will present results from the DUVET survey of starbursting galaxies observed using the IFU KCWI. We measure outflows in 10 face-on local galaxies with ~1000 lines of sight of individual outflow measurements at 500pc resolution. Using our observations, (1) we are able to discriminate between widely used models of the launching mechanism of the outflow. (2) We derive much needed scaling relations for the relationship between star formation and outflow properties. (3) We compare to observations from NOEMA, and connect the outflows with location in the resolved Kennicutt-Schmidt relation to find that starburst regions remove more gas via the outflow than they convert into stars. This directly measures how outflows regulate star formation and contribute to the baryon cycle. (4) Finally, we develop a non-parametric method to measure outflows in emission lines. We map the mass of outflowing gas reaching velocities high enough to leave the galaxy and compare this to gas which likely remains within galaxy fountains. DUVET's sample of resolved outflows provides a new perspective to make ground-breaking constraints on how stellar feedback regulates star formation, contributes to the baryon cycle, and drives galaxy evolution.
