Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000a%26a...356.1112y&link_type=abstract
Astronomy and Astrophysics, v.356, p.1112-1118 (2000)
Astronomy and Astrophysics
Astrophysics
4
Moon, Planets And Satellites: General
Scientific paper
We estimate the production rate of lunar ejecta escaping from the Moon, taking into account the probable surface condition, i.e. the regolith layer. The production of lunar ejecta from a particulate surface is more effective than that from a hard surface. In our model for a particulate surface, the production rate is estimated to be about 10-3kg s-1, about 20 times higher than that calculated by Alexander et al. (\cite{ale}) for the hard surface model. According to previous studies based on the hard surface model, lunar ejecta with sizes greater than a few mu m cannot escape from the Moon. Our new results suggest that, in addition to micron- and submicron-sized ejecta, lunar ejecta with radii larger than tens of mu m can escape from the Moon. These large grains may contribute to the IDPs collected in the upper atmosphere of the Earth.
Nakamura Akiko M.
Yamamoto Shoji
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