The phase structure of cosmic ray driven outflows in stream fed disc galaxies

Understand

Feeding with gas in streams is predicted to be an important galaxy growth mechanism.

• Using an idealised setup, we study the impact of stream feeding (with 10$^7$ M$_{\odot}$ Myr$^{-1}$ rate) on the star formation and outflows of disc galaxies with $\sim$10$^{11}$ M$_{\odot}$ baryonic mass.
• The magneto-hydrodynamical simulations are carried out with the PIERNIK code and include star formation, feedback from supernova, and cosmic ray advection and diffusion.
• We find that stream accretion enhances galactic star formation.