3:30–4:30 pm ERC 161
Host: Hsiao-Wen Chen
Harley Katz (Oxford University)
Title: Insights into the ISM properties and baryon cycle of galaxies from the epoch of reionization through cosmic noon
Abstract:
Much of the information about the ISM properties and large-scale gas flows of a galaxy are encoded in its spectrum. Extracting this information remains a key theoretical challenge that currently limits our ability to constrain models of galaxy formation. In this talk, I will introduce a new suite of codes called RAMSES-RTZ and PRISM that couple multi-frequency radiative transfer to a non-equilibrium chemistry network in an effort to predict galaxy spectra from first principles in cosmological galaxy formation simulations. I will show how currently used methods for inferring galaxy metallicity and outflow rates lead to strong systematic biases that impact fundamental scaling relations. I will then show how our new generation of simulations is being used to recalibrate how we measure galaxy metallicities and outflow rates and their application to JWST observations at z > 6 and MUSE observations at z > 1.
About speaker:
I am currently a Beecroft Fellow in Cosmology having completed my PhD on Numerical Simulations of Galaxy During the Epoch of Reionization at the University of Cambridge. My current work focuses on large scale magneto-radiation-hydrodynamics simulations of the first stars, galaxies, and black holes with a particular emphasis on comparing theory with observation.
