Statistics – Computation
Scientific paper
Oct 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985a%26a...151..222p&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 151, no. 2, Oct. 1985, p. 222-234. Research supported by the Institut National
Statistics
Computation
6
Density Distribution, Earth-Moon System, Flux Density, Hypervelocity Impact, Lunar Surface, Asymmetry, Computational Astrophysics, Particle Size Distribution, Selenology, Moon, Impacts, Flux, Distribution, Symmetry, Bombardment, Hypotheses, Simulations, Trajectories, Gravity Effects, Collisions, Parameters, Latitude, Orbits, Analysis
Scientific paper
The author reinvestigates the hypothesis of an early lunar bombardment (≡4 aeons ago) by geocentric projectiles. These projectiles may have originated either as Earth satellites or as heliocentric planetoids later captured by the Earth's gravitational field and possibly fragmented by tidal forces inside the Roche limit. A 3-d numerical simulation is used to compute the trajectories of an initial set of projectiles, under the attraction of Earth and Moon, and to determine the loci of impacts, on the lunar surface, of colliding bodies. The simulation end-product is the local flux of impacts, normalized to the mean total flux over the whole lunar surface. The computed distributions meet main features of the observed lunar distribution of large craters and might give a mechanical explanation to the reported polar impact excess.
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