Paper:	Can Earth-Type Habitable Planets Exist Around 47 UMa?
Volume:	294, Scientific Frontiers in Research on Extrasolar Planets
Page:	221
Authors:	Cuntz, M.; von Bloh, W.; Bounama, C.; Franck, S.
Abstract:	We explore whether the existence of Earth-type habitable planets is in principle possible in the planetary system of 47 UMa. Our analysis assumes that Earth-type planets have successfully formed and are orbitally stable. Our study of habitability deliberately follows an Earth-based view while investigating the long-term possibility of photosynthetic biomass production. Here the stellar luminosity and the age of star/planet system are of fundamental importance for the existence of planetary habitability. We find that the likelihood of Earth-type habitable planets is increased if assumed that 47 UMa is relatively young (less than about 6 Gyr) and has a relatively small stellar luminosity.

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