Speaker
Description
The interstellar and circumgalactic media are the two important reservoirs that fuel star formation in galaxies. Their highly turbulent internal dynamics are shaped by feedback processes such as supernova (SN) explosions and subsequently accelerated cosmic rays (CRs). With recent advances in the hydrodynamical modeling of the interactions between CRs, magnetic fields, and their environment, it became possible to quantify the impact and model the transport of CRs in the multiphase interstellar and circumgalactic media with unprecedented accuracy and detail. Numerical modeling of the plethora of microphysical processes and astrophysical feedback channels is challenging and motivated us to develop the CRISP (Cosmic Ray and InterStellar Physics) model, which incorporates the relevant CR and ISM physics for galaxy formation in a single-cast numerical framework. We will present the results of a suite of isolated high-resolution CRISPy galaxy simulations designed to understand the role of CR, SN, and radiative feedback in shaping the dynamics in and around galaxies. We will 1) show how the presence of CRs tangibly changes the galactic wind driving process and the thermodynamical structure of galactic winds, 2) highlight the morphological differences between CR-affected and unaffected inner circumgalactic media, and 3) discuss implications of these two effects for metal ion column densities probed by absorption line studies.
