Orbital migration, heating, metallicity evolution history of the Galactic disc

Results of the chemo-chrono-dynamical model of the Milky Way's disc in H. Zhang et al. (2025). The results include the time evolution of radial and vertical velocity dispersion, and the angular momentum diffusion coefficient at different radii. Also, it has the evolution of stellar birth metallicity gradient (or ISM metallicity gradient) and scale length of the star-forming disc at different lookback times. There's another file that contains the ratios of the variation of the three orbital actions in cylindrical coordinates. Below are some example codes to access these results.