GLOB.058 This is the unformatted Fortran output from the radiative hydrodynamic simulation, this contains the snapshot for the initial conditions of the critical velocity ionisation, units are cgs. CIV_GLOBAL This fortran file reads in the rad-hydro data and calculates instantaneous critical velocity rates and changes the surfaces from being height surfaces to isobaric surfaces this output is in formatted tables ready to be read by any reasonable program as such only signle isobars are output at a time (to save on the massive IO need for formatted data) ionisation_fraction_cvi10 this is a csv file for the entire atmosphere for a 10kms critical velocity, plasma densities can be calculated using the density in the glob.058 file isobar_averaged_ifrac this is the isboar averaged ionisation fraction, the key result of the paper. density the gas density from the snapshot for easy use (in g/cm-3) any issues or further details needed Please do not hesitate to contact me: alasdair.wilson@glasgow.ac.uk alasdair.wlsn@gmail.com