Fig. 3: Numerical results.
From: Ryugu’s observed volatile loss did not arise from impact heating alone
a The result of the Lab-simulation at the high vimp obtained with the iSALE shock physics code. A snap shot (right) and provenance plot (left) are shown. The colour indicates the expected residual temperature Tres calculated from the temporal entropy. A grid of tracer probes, plotted every 25 cells in the horizontal and vertical directions, is shown as grey lines. The location of the shock front is shown in a white line. Note that we did not calculate Tres in the Al2O3 projectile. b The same as (a), except the result of the Ryugu-simulation is shown. In this calculation, the impact velocity was set to 7 km s–1. In these panels, the results are shown for t = 5ts (t is the time after impact), where ts = Dp/vimp and is the characteristic time for projectile penetration, and Dp is the projectile diameter. This time was chosen because at this point the impact heating is finished.
