Speaker
Dr
Mark Richardson
(University of Oxford)
Description
The circumgalactic medium (CGM) encompasses gas that extends from the outskirts of a galaxy to the edge of its halo, mediating gas accretion and outflows. Observations of absorption in background quasar spectra reveal a wealth of information about the structure of the CGM, in particular that it is an environment polluted by metals and cool gas from galactic outflows. By using simulations of galaxies forming in a cosmological volume we can best understand the evolution of these outflows, and put constraints on their subgrid model parameters through careful comparison to observations. We present a suite of 10 pc resolution cosmological zoom simulations, some with 100 pc resolution enforced in the CGM, where we vary the prescriptions for star formation, supernova feedback, and/or radiative transfer, and show how these different models affect the make-up of the CGM. We also discuss our efforts comparing outputs with observations, highlighting the strengths and weaknesses of our models.
Primary author
Dr
Mark Richardson
(University of Oxford)
Co-authors
Prof.
Adrianne Slyz
(University of Oxford)
Prof.
Julien Devriendt
(University of Oxford)
