I will present the latest results from our on-going multi-wavelength survey of galactic-scale ouflows in nearby actively star-forming and/or black-hole-accreting galaxies with an emphasis on the cool neutral and molecular gas phases. I will review the structure, mass, energetics, power source, extent, and dependence on host galaxy properties of these gas phases in galactic outflows. Very high resolution 3D observations of the nearest and best known starburst- and AGN-driven outflows will be discussed to provide further insight into the physical entrainment and mass-loading mechanisms of these outflows. Overall, our results suggest that the cool neutral and molecular gas phases are the key to understanding galactic outflows in gas-rich galaxies: they carry significant amounts of mass and energy, show evidence for driving by the central black hole, and extend further from the galaxy than previously known.
A few obvious questions that come to mind:
- observational: uncertainties on outflow mass & energetics
- observational: uncertainties/limitations on outflow size measurements
- observational & theoretical: observational evidence for entrainment of cool ISM vs in-situ formation of cool clumps in the hot wind