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The stability of the orbits of Earth-mass planets in the habitable zone of 47 Ursae Majoris

Jones, B. W. and Sleep, P. N. (2002). The stability of the orbits of Earth-mass planets in the habitable zone of 47 Ursae Majoris. Astronomy & Astrophysics, 393(3) pp. 1015–1026.

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We have investigated whether Earth-mass planets could survive in the habitable zone (HZ) of the 47 Ursae Majoris system. Mixed-variable symplectic numerical integration has been used to investigate the orbits of putative Earth-mass planets. Whereas the 47 UMa system as previously known, with just one giant planet, could have Earth-mass planets that remain confined to the HZ for a fairly wide range of initial obital parameters, the second (outer) giant now known to be present has reduced the range significantly. There are however confined orbits particularly if either the present eccentricity of the outer giant is close to zero, or the giant masses are close to the minimum values. We have also shown that the eccentricity of the outer giant's orbit is unlikely to exceed about 0.15 at minimum giant mass and 0.13 at 1.5 times this minimum.

Item Type: Journal Item
Copyright Holders: 2002 ESO
ISSN: 1432-0746
Keywords: stars; planetary systems; planets; satellites
Academic Unit/School: Faculty of Science, Technology, Engineering and Mathematics (STEM) > Physical Sciences
Faculty of Science, Technology, Engineering and Mathematics (STEM)
Interdisciplinary Research Centre: Centre for Earth, Planetary, Space and Astronomical Research (CEPSAR)
Item ID: 4441
Depositing User: Users 6827 not found.
Date Deposited: 06 Jul 2006
Last Modified: 07 Oct 2017 18:04
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