Log10 of the density distribution for model 40-200-0.1 after 2:00 x 104 yrs of evolution, plotted in the z = 0 plane. Contours show the color field plotted at 0.01, 0.025, 0.05, 0.075, and 0.1. The x axis is horizontal and the y axis is vertical. The downward propagating shock wave has compressed the target cloud core and is injecting shock front material through multiple Rayleigh-Taylor (RT) fingers. Credit: Carnegie Institution for Science