These simulations also include MHD+, magnetohydrodynamics as well as fully-anisotropic Spitzer-Braginskii conduction and viscosity.

We ran these simulations after we fixed the cosmic-ray heating bug in Gizmo (after 2018-4-26). That bug erroneously applied a heating term from cosmic rays to all gas in the simulation at z >~ 8, which prevented gas cooling and star formation at those early times, and which affects other FIRE-2 simulations.

Most of these MHD+ and Cosmic Ray simulations have a subset of 61 out of 601 snapshots available, specifically, every tenth snapshot. This simulation also is missing snapshots 540 to 600. As a result, we do not provide particle tracking files.