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Astro Seminar

Molecular gas in the proto-cluster and Circum-galactic media in the early universe

Speaker: Matt Lehnert (Lyon)
Date: Wednesday 16 February 2022
Time: 14:00
Venue: Zoom

One of the most outstanding questions in contemporary astrophysics is how did the intercluster/circum-galactic medium contain as much mass as it does and how did it develop the multiphase gas phase distribution we observe today. I present several observational results showing that the gas is indeed multiphase in inter-cluster/-galactic medium of distant proto-clusters and around distant galaxies. Much of the gas distributed on large scales is indeed molecular. Within this context, I discuss how such gas may have achieved its phase distribution -- how it is heated and cooled -- and discuss several theoretical implications of our findings on the nature of gas cycle in distant proto-clusters and galaxies.