The gas environment of galaxies across 10 billion years

Speaker : Michele Fumagalli

Abstract :

The evolution of galaxies is closely connected to the gas environment in
which galaxies reside. Traditionally, this tenuous gas that cycles in and out
of galaxies has been studied primarily in absorption using quasar
spectroscopy. The deployment of large integral field spectrographs at 8-
meter telescopes, particularly MUSE at VLT, has transformed our view of
the interplay between the ambient gas and galaxies by enabling highly
complete spectroscopy in emission down to very low surface brightness. In
this talk, I will present highlights from multiple large programs that are
shedding light onto the link between gas and galaxies as a function of
cosmic time (z~0.5-4.5), both by combining redshift surveys of galaxies
with gas seen in absorption and by directly unveiling the CGM and IGM in
emission. These observations further uncover clear evidence that the large-
scale galaxy environment plays a significant role in shaping the gas
distribution within the CGM of galaxies.