Cake Talk by Antonello Calabrò
Gaseous flows inside and outside galaxies are key to understanding galaxy evolution, as they regulate their star-formation activity and chemical enrichment across cosmic time. In this talk, I will present a study on the ISM kinematics of a sample of ~ 300 CIII] and HeII emitters at redshift 2 < z < 5 selected from the VANDELS survey and representative of the star-forming Main Sequence in the stellar mass range 9<log(M*/Msun)<11. Outflow and inflow velocities, which are derived as the velocity shift of low and high-ionization far-UV absorption lines (i.e., SiII, CII, AlIII, SiIV, AlIII) from the systemic redshift, are then compared to other galaxy properties in order to investigate their physical drivers. I will also derive the mass outflow rate, and finally explore the fate of the outflows by comparing their velocities to the typical escape velocity estimated from a subset of our sample with MOSFIRE follow-up.