Cosmic-Ray Transport in Varying Galactic Environments

We study the propagation of mildly-relativistic cosmic rays (CRs) in multiphase interstellar medium environments with conditions typical nearby disk galaxies. employ techniques developed Armillotta+21 to post-process three high-resolution TIGRESS magnetohydrodynamic simulations modeling local patches star-forming galactic disks. Together, cover a wide range gas surface density, gravitational potential, and star formation rate (SFR). Our prescription for CR includes effects advection by background gas, streaming along magnetic field at ion Alfv\'en speed, diffusion relative waves, coefficient set balance between streaming-driven wave excitation damping mediated properties. find that combined transport processes are more effective higher SFR. These characterized higher-velocity hot outflows (created clustered supernovae) rapidly advect CRs away from plane. As consequence, ratio midplane pressure pressures decreases increasing also use post-processed make predictions regarding potential dynamical impacts CRs. The relatively flat profiles near argue they would not provide significant support against gravity most ISM mass. However, gradients larger than other extra-planar region (|z|>0.5 kpc), suggesting may affect dynamics fountains and/or winds. degree this impact is expected increase lower