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[Colloquium] Mapping Intergalactic Gas at Cosmic Noon

Date and Time
Location
Kavli Auditorium in the KITP

Andrew Newman, Carnegie Institution for Science

Title: Mapping Intergalactic Gas at Cosmic Noon

Abstract: The large-scale matter distribution in the universe (the “cosmic web”) seeds the formation of galaxies and modulates their evolution in ways that are still not well understood. The cosmic web in the distant universe is generally mapped by observing the positions of galaxies. Recently a new perspective has been gained by mapping the diffuse gas in the intergalactic medium (IGM), which contains the majority of baryons and, on large scales, traces the dark matter backbone. The Lyman-Alpha Tomography IMACS Survey (LATIS) has now produced large 3D maps of the IGM with ~Mpc resolution at a pivotal era known as “cosmic noon” (redshift z ~ 2-3, 11 Gyr ago). I will present the LATIS maps and discuss how they inform our understanding of the interplay between early galaxies and their large-scale surroundings.