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On secular resonances of small bodies in the planetary systems

Published online by Cambridge University Press:  01 August 2006

Jianghui Ji ,
L. Liu  and
G. Y. Li
Jianghui Ji
Affiliation:
Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210008, China email: jijh@pmo.ac.cn National Astronomical Observatory, Chinese Academy of Sciences, Beijing 100012, China email: xhliao@nju.edu.cn
L. Liu
Affiliation:
Department of Astronomy, Nanjing University, Nanjing 210093, China
G. Y. Li
Affiliation:
Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210008, China email: jijh@pmo.ac.cn National Astronomical Observatory, Chinese Academy of Sciences, Beijing 100012, China email: xhliao@nju.edu.cn
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Abstract

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We investigate the secular resonances for massless small bodies and Earth-like planets in several planetary systems. We further compare the results with those of Solar System. For example, in the GJ 876 planetary system, we show that the secular resonances ν1 and ν2 (respectively, resulting from the inner and outer giant planets) can excite the eccentricities of the Earth-like planets with orbits 0.21≤ a <0.50 AU and eject them out of the system in a short timescale. However, in a dynamical sense, the potential zones for the existence of Earth-like planets are in the area 0.50≤ a ≤1.00 AU, and there exist all stable orbits last up to 105 yr with low eccentricities. For other systems, e.g., 47 UMa, we also show that the Habitable Zones for Earth-like planets are related to both secular resonances and mean motion resonances in the systems.

Keywords

n-body simulationsplanetary systemshabitable zone
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 2 , Symposium S236: Near Earth Objects, our Celestial Neighbors: Opportunity and Risk , August 2006 , pp. 77 - 84
Copyright
Copyright © International Astronomical Union 2007

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