Physics
Scientific paper
Mar 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986jbis...39...99f&link_type=abstract
British Interplanetary Society, Journal (Interstellar Studies) (ISSN 0007-084X), vol. 39, March 1986, p. 99-109.
Physics
Extrasolar Planets, Milky Way Galaxy, Planetary Systems, Space Habitats, Biosphere, Computerized Simulation, Metallicity, Stellar Evolution, Stellar Mass, Planets, Models, Analysis, Computer Methods, Simulations, Popular, Characteristics, Physical Properties, Mass, Gravity Properties, Water, Atmosphere, Pressure, Temperature, Parameters, Procedure, Climate
Scientific paper
A lengthy analysis of the output of the "Silicon Creation" model is presented. Seven thousand five hundred microcomputer simulations of stars in the mass range 0.6 - 1.3 M_sun; suggest that habitable planets are to be expected to occur around stars of between 0.8 - 1.2 M_sun;, and most commonly around stars between 0.95 - 1.05 M_sun;. An extended simulation of an evolving volume of Galactic disc space, 270 ly in diameter, containing 100,000 star systems of maximum age 1010 years was performed, assuming constant stellar birthrate and rising "metallicity" with time. 86 habitable planets were produced giving a value for the ratio of habitable planets to stars in the disk NHP/N*disc = 8.6×10-4. The average separation between habitable planets is therefore ≡50 ly and the number of habitable planets in the Galaxy is approximately 90 million.
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