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Dynamics of extrasolar systems at the 5/2 resonance: application to 47 UMa

Published online by Cambridge University Press:  28 February 2005

Dionyssia Psychoyos  and
John D. Hadjidemetriou
Dionyssia Psychoyos
Affiliation:
Department of Physics, University of Thessaloniki, 54124 Thessaloniki, Greece email: hadjidem@auth.gr
John D. Hadjidemetriou
Affiliation:
Department of Physics, University of Thessaloniki, 54124 Thessaloniki, Greece email: hadjidem@auth.gr
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Abstract

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A complete study is made of the 5/2 resonant motion of two planets revolving around a star, in the model of the general planar three body problem. Families of 5/2 resonant symmetric periodic orbits are computed numerically, for the masses of the extrasolar system 47 UMa. The phase of the two planets (alignment or antialignment of perihelia and position of each planet at perihelion or aphelion) plays an important role, and the change of the phase, other things being the same, may destabilize the system. Stable motion exists even in the case where the two planetary orbits intersect. A small value of the eccentricities, for the same phase, stabilizes the system. The above results are applied to the study of 47 UMa, which according to some observations is close to the 5/2 resonance.To search for other articles by the author(s) go to: http://adsabs.harvard.edu/abstract_service.html

Keywords

periodic orbits - resonances - extrasolar systems - 47 UMa
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 2004 , Issue IAUC197 , August 2004 , pp. 55 - 62
Copyright
© 2005 International Astronomical Union