The origin of the moon and the single-impact hypothesis. II

Details The origin of the moon and the single-impact hypothesis. II The origin of the moon and the single-impact hypothesis. II

Jul 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987icar...71...30b&link_type=abstract

Icarus (ISSN 0019-1035), vol. 71, July 1987, p. 30-45.

Astronomy and Astrophysics

Astronomy

71

Astronomical Models, Hypervelocity Impact, Lunar Evolution, Planetary Evolution, Earth Core, Lunar Core, Mass Ratios, Roche Limit, Moon, Orign, Hypotheses, Impacts, Numerical Methods, Collisions, Models, Formation, Simulations, Parameters, Core, Hydrodynamics, Computer Methods, Velocity, Mass, Composition, Roche Limit, Ejecta, Disk, Orbits, Iron, Procedure, Diagrams, Size, Chemistry, Distribution, Gravity Effects

Scientific paper

In the present nine numerical simulations of a planetary collision scenario for lunar formation, the mass ratio between the protoearth and the impactor, both of which are iron-cored, is varied between 0.1 and 0.25; the two different relative velocities considered (for the impactor at infinity) are 0 and 10 km/sec. It is found that while more than one lunar mass of iron-poor material is thrown into orbit in the case of low-velocity collision with an impactor mass in the (6.5-8.2) x 10 to the 26th g range, more massive impactors lead to the throwing off of too little mass into orbit.

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