Early-Stage Coupling for Oblique Impacts in Granular Material

Introduction and Background: Impact events control the distribution of materials on planetary surfaces. Early-time processes, during which the projectile is still coupling its energy and momentum to the target, affect the emplacement of distal ejecta and play a greater role at larger planetary scales. These effects are especially apparent in oblique impacts, which often display earlystage asymmetries in the ejecta deposits. The early-time ejecta velocity distribution for oblique impacts has not been studied in detail for granular materials. Here we examine the time-resolved ejecta dynamics for oblique hypervelocity impacts through a novel imaging technique.