Galaxies evolve under the influence of gas exchanges with their surrounding gaseous halos, the so-called circumgalactic medium (CGM), extending over tens of kpc. A solid characterisation of both galactic gas flows and chemical composition of the CGM is thus crucial to understand galaxy evolution, especially in the first few Gyrs of cosmic time, when galaxies rapidly assembled their masses and reached their chemical maturity.
I will present new studies on galactic outflows and CGM metal enrichment in the early Universe, exploiting recent data from the ALMA large program ALPINE, that observed [CII] and dust in more than hundred star-forming galaxies at z~4-6.
Meeting:
https://uniroma1.zoom.us/j/85962662885?pwd=UDFLcTYrWHNSWm5uQ1ZrbEhsalVUUT09
Raffaella Schneider