My current research interests include the geology, geophysics, and geomorphology of the terrestrial planets and other solid solar system bodies (particularly asteroids, comets, and planetary satellites), specializing in regolith generation, surface erosion, and impact cratering related processes. This interest has led to multiple lines of scientific investigation, utilizing spacecraft observations and laboratory impact experiments, combined with analytical and numerical modeling techniques, to answer outstanding questions regarding the surface processes, internal structure, and developmental history of these objects.
Past research highlights:
- Described the erosional process whereby spin and gravity combine to maintain asteroid surfaces in a minimum potential difference state (Icarus, 2014)
- Determinted the surface properties of comet 9P/Tempel 1 via measurements of the crater produced by Deep Impact (Icarus, 2013)
- Solved the long-standing question of how crater density equilibrium is reached on heavily-cratered terrains (Icarus, 2009)
- Determined the density of comet 9P/Tempel 1 via the expansion rate of the ejecta plume produced by Deep Impact (Icarus, 2007)
- Linked the paucity of small craters on asteroid 433 Eros to the effects of impact-induced seismic shaking (Science, 2004, Icarus, 2005)
- Extracted surface features of Saturn's moon Titan hidden within the Orange-fliter images taken by Voyager 1 (Icarus, 2004)