Space weathering on airless bodies: Resolving a mystery with lunar samples

Details Space weathering on airless bodies: Resolving a mystery with lunar samples Space weathering on airless bodies: Resolving a mystery with lunar samples

Sep 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000m%26ps...35.1101p&link_type=abstract

Meteoritics & Planetary Science, vol. 35, no. 5, pp. 1101-1107 (2000).

Physics

185

Scientific paper

Using new techniques to examine the products of space weathering of lunar soils, we demonstrate that nanophase reduced iron (npFe0) is produced on the surface of grains by a combination of vapor deposition and irradiation effects. The optical properties of soils (both measured and modeled) are shown to be highly dependent on the cumulative amount of npFe0, which varies with different starting materials and the energetics of different parts of the solar system. The measured properties of intermediate albedo asteroids, the abundant S-type in particular, are shown to directly mimic the effects predicted for small amounts of npFe0 on grains of an ordinary chondrite regolith. This measurement and characterization of space weathering products seems to remove a final obstacle hindering a link between the abundant ordinary chondrite meteorites and common asteroids.

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