Discrete calculations of interstellar migration and settlement |
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Authors: | Eric M. Jones |
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Affiliation: | Los Alamos Scientific Laboratory, P.O. Box 1663, Los Alamos, New Mexico 87545, USA |
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Abstract: | Monte Carlo calculations of the expansion of space-faring civilizations are presented for a wide range of values of the population growth coefficient (α) and emigration coefficient (γ). Even for the very low values proposed by Newman and Sagan (α = 10?4per year; γ = 10?8per year) the migration wavefront expands at 1.4 × 10?5 pc per year. Even with this low expansion velocity, such a civilization would fill the Galaxy in about 109 years. Filling times of the order of 60 million years seem probable. The wavefront velocity is approximated by , where is the average radial distance traveled, the average distance traveled, and υs the ship speed. This approximation was derived by Newman. |
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