Speaker
Description
The circumgalacticum medium (CGM) is home to all interactions of gas flows into, out of, and around the galaxy, but these processes are not fully understood. How do inflows and outflows interact? What is the role of turbulence in the CGM in affecting or mediating these interactions? I will show, using the Figuring Out Gas & Galaxies In Enzo (FOGGIE) cosmological simulations that highly resolve CGM structure and turbulence, that the flows of gas coming from the cosmic web do not fall cleanly into the hot mode/cold mode distinction of galactic accretion onto Milky Way mass galaxies. Instead, feedback from the galaxy drives significant turbulence in the CGM that acts to disrupt inflows. I will show that the mixing of metal-enriched outflows with fragmenting inflow streams produces high O VI surface brightnesses in clumpy structures near the galaxy disk that can be observed with upcoming CGM emission probes. This analysis of high-resolution CGM simulations provides both physical understanding of galaxy evolution and observational predictions of the baryon cycle that will be invaluable for interpreting the first CGM emission data that is coming within the next few years.