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Can terrestrial planets exist in the habitable zones of known exoplanetary systems?

Jones, Barrie W. and Sleep, P. Nick (2001). Can terrestrial planets exist in the habitable zones of known exoplanetary systems? Proceedings- Spie the International Society for Optical Engineering, 4273 pp. 33–43.

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The habitable zone (HZ) is defined as the range of distances from a star within which water at the surface of a terrestrial planet would be in the liquid phase. We have investigated whether terrestrial planets could exit in the HZs of known exoplanetary systems long enough for life to have emerged and to have evolved. Four contrasting systems in which giant planets have been detected have been examined, and HZs have been defined for each system using conservative definitions for the HZ boundaries. Mixed- variable sympletic numerical integration has ben used to investigate the orbits of putative terrestrial planets launched within the HZ of each system. In Rho CrB the HZ is exterior to the giant, and in 47 UMa it is interior. We have shown that in each of these two systems terrestrial planets could have orbits with semimajor axes that remain confined to the HZ for biologically significant lengths of time. We have also shown that the Gliese 876 and Ups And systems are very unlikely to have such orbits.

Item Type: Journal Article
Copyright Holders: 2001 SPIE--The International Society for Optical Engineering
ISSN: 0277-786X
Academic Unit/Department: Science > Physical Sciences
Interdisciplinary Research Centre: Centre for Earth, Planetary, Space and Astronomical Research (CEPSAR)
Item ID: 4326
Depositing User: Users 6827 not found.
Date Deposited: 05 Jul 2006
Last Modified: 14 Jan 2016 16:00
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