September 26, 2024 – 4pm ET / 1pm

New Constraints on Thermodynamic Profiles of the Outer Circumgalactic Medium

Speaker

Nicholas Battaglia, Cornell University

Abstract

An exciting new window into the circumgalactic medium (CGM) has opened up with the recent observations of the thermal and kinetic Sunyaev-Zel’dovich (SZ) effects on galactic spatial scales. After introducing the SZ effects, I will present the ongoing efforts to extract these galaxy scales SZ signals in data from the Atacama Cosmology Telescope. I will show how these observations are currently being used to constrain important physical processes, like feedback, that govern galaxy formation. Additionally, I will present the puzzle these observations pose to state-of-the-art cosmological simulations. I will conclude by highlighting the expected rapid growth in such SZ observations over the next decade with the upcoming millimeter and sub-millimeter focused experiments, like the Simons Observatory, CCAT, and CMB-S4.

Zoom link

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