Numerical Models of Comet and Asteroid Impacts
Numerical simulation techniques can be applied to the collision of large organic-rich objects (comets and carbonaceous chondrite asteroids) with the early Earth. Results from these simulations imply that it is possible for a fraction of the extraterrestrial organic material to survive the high temperatures occurring during the impact (and thus contribute prebiotic material to the early Earth). Recent models for atmospheric passage, however, predict that the fate of such candidate impactors is an airburst capable of pyrolyzing the entire organic inventory of the comet or asteroid.
KeywordsCarbonaceous Chondrite Atmospheric Drag Organic Survivability Chondrite Meteorite Comet Impactor
Unable to display preview. Download preview PDF.
- Ceplecha, Z. (1977), Meteoroid populations and orbits. In Comets, Asteroids and Meteorites ( A.H. Delsemme, ed.). University of Toledo, Toledo, OH.Google Scholar
- Eliezer, S., A. Ghatak, and H. Hora (1986), An Introduction to Equations of State: Theory and Applications. Cambridge University Press, Cambridge.Google Scholar
- Krinov, E.L. (1966), Giant Meteorites. Pergamon, Oxford.Google Scholar
- Melosh, H.J. (1989), Impact Cratering: A Geologic Process. Oxford University Press, New York.Google Scholar
- Monaghan, J.J. (1985), Particle methods for hydrodynamics, Comput. Phys. Rep., 3, 7 1124.Google Scholar
- SESAME ‘83 (1983), Report on the Los Alamos Equation-of-State Library, LALP-83–4. Los Alamos National Laboratory, Los Alamos, NM.Google Scholar
- Thompson, S.L., and H.S. Lauson (1972), Improvements in the Chart-D radiation-hydrodynamic code III: Revised analytic equations of state. Sandia National Laboratory Report RR-71 0714.Google Scholar
- Tillotson, J.H. (1962), Metallic equation of state for hypervelocity impact. General Atomic Report GA-3216.Google Scholar
- Wilkening, L.L. (1978), Carbonaceous chondritic material in the Solar System, D. Naturwiss., 65, 73.Google Scholar