Space Weathering on Asteroid Surfaces

Details Space Weathering on Asteroid Surfaces Space Weathering on Asteroid Surfaces

Sep 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006dps....38.3504l&link_type=abstract

American Astronomical Society, DPS meeting #38, #35.04; Bulletin of the American Astronomical Society, Vol. 38, p.547

Astronomy and Astrophysics

Astronomy

Scientific paper

Simulations of micrometeorite impacts are difficult because they require the acceleration of micron-sized grains (dust particles) to velocities of tens of km/sec. Laboratory studies have shown pulsed nanosecond laser irradiation may adequately simulate dust particle impacts over a certain range of grain size and velocity, since for a given energy density, the size of the craters produced and the composition of the ions ejected from the surface are similar. In our laboratory, we use a 193 nm pulsed (10 ns) laser to simulate micrometeorite impacts, to help interpret remote sensing of asteroid Eros taken by the NEAR-Shoemaker spacecraft. Here we will present results, where we characterize deposits of olivine and forsterite produced by laser irradiation, using reflectance and X-ray Photoelectron spectroscopy.

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