Properties of the multiphase outflows in local (ultra)luminous infrared galaxies

ABSTRACT Galactic outflows are known to consist of several gas phases; however, the connection between these phases has been investigated little and only in a few objects. In this paper, we analyse Multi Unit Spectroscopic Explorer (MUSE)/Very Large Telescope (VLT) data 26 local (U)LIRGs study their ionized neutral atomic phases. We also include objects from literature obtain sample 31 galaxies with spatially resolved multiphase outflow information. find that phase on average an electron density three times higher than disc (ne,disc ∼ 145 cm−3 versus ne,outflow 500 cm−3), suggesting cloud compression is more important dissipation. difference extinction correlates mass. Together analysis velocities, suggests at least some associated ejection dusty clouds disc. This may support models where radiation pressure dust contributes driving galactic outflows. The presence relevant for potential formation molecules inside them. combine our millimetre investigate molecular phase. accounts 60 ${{\ \rm per\ cent}}$ total mass rate most fraction active nuclei (AGN)-dominated systems. order 10 cent}}$, while negligible. ionized-to-molecular declines slightly AGN luminosity, although large scatter.