Astronomy and Astrophysics – Astrophysics
Scientific paper
Mar 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aipc..895..181f&link_type=abstract
FIFTY YEARS OF ROMANIAN ASTROPHYSICS. AIP Conference Proceedings, Volume 895, pp. 181-186 (2007).
Astronomy and Astrophysics
Astrophysics
Extrasolar Planetary Systems, Orbital And Rotational Dynamics, Origin And Evolution
Scientific paper
We estimate the likelihood to find habitable Earth-like planets on stable orbits for 86 selected extrasolar planetary systems, where luminosity, effective temperature and stellar age are known. For determining the habitable zone (HZ) an integrated system approach is used taking into account a variety of climatological, biogeochemical, and geodynamical processes. Habitability is linked to the photosynthetic activity on the planetary surface. We find that habitability strongly depends on the age of the stellar system and the characteristics of a virtual Earth-like planet. In particular the portion of land / ocean coverages plays an important role. We approximated the conditions for orbital stability using a method based on the Hill radius. Almost 60% of the investigated systems could harbour habitable Earth-like planets on stable orbits. In 18 extrasolar systems we find even better prerequisites for dynamic habitability than in our own solar system.
Bounama Ch.
Franck Siegfried
von Bloh Werner
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