May 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008aas...212.5302s&link_type=abstract
American Astronomical Society, AAS Meeting #212, #53.02; Bulletin of the American Astronomical Society, Vol. 40, p.249
Other
Scientific paper
It is likely that, in the next several years, the Corot and Kepler satellites will find many terrestrial planets around other stars. In order to judge what fraction of these planets are likely to be hospitable to life, it is important to reassess the notion of the habitable zone. Classical considerations of habitability, in the context of extrasolar planets, have often regarded it as a binary property (either a planet is or is not habitable). But according to the standard liquid water definition, the Earth itself is only partially habitable. I will describe a way to use energy balance climate models to assess the spatial and temporal habitability of terrestrial planets that are not too different from the Earth. Initial investigations of model planets' temperature distributions indicate that climate varies with observable features of planets (e.g., how far they are from their star) and unobservable features (e.g., how fast they are spinning, how much surface water they have, what their obliquity is). The habitability of model pseudo-Earths with different rotation rates or land-ocean fractions, for instance, generally differs significantly from that of the Earth itself.
Menou Kristen
Scharf Caleb. A.
Spiegel David S.
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