DGCE SIG Seminar, 23 July 2026
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DGCE SIG Seminar
Diffuse Gas in Cosmic Ecosystems Science Interest Group
Location
Virtual
Dates
23 July 2026
4:00pm ET / 1:00pm PT
Community
DGCE SIG
Type
Seminar
From Micro to Macro: Connecting the Physics of Galaxy Formation Across Scales
Speaker
Drummond Fielding, New York University
Abstract
Galaxy formation is controlled by the cycling of diffuse gas through the ISM, CGM, and larger-scale environment, but predictive models remain limited by unresolved microphysics. I will discuss how sub-pc processes—including cosmic-ray transport, magnetic reconnection, and turbulent mixing—regulate multiphase structure, energy and momentum transport, and the launching of galactic winds. I will then describe how simulations, analytic models, and new multi-scale numerical methods can connect these processes to kpc-scale feedback and Mpc-scale galaxy evolution. The aim is to build physically grounded models of gas cycling that can sharpen our interpretation of observations and move galaxy formation theory beyond phenomenological feedback prescriptions.
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