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The secular evolution and dynamical architecture of the Neptunian triplet planetary system HD 69830
Ji, Jianghui; Kinoshita, Hiroshi; Liu, Lin; Li, Guangyu
2007-03-10
发表期刊ASTROPHYSICAL JOURNAL
卷号657期号:2页码:1092-1097
摘要We perform numerical simulations to study the secular orbital evolution and dynamical structure in the HD 69830 planetary system, using the best-fit orbital solutions by Lovis and coworkers. In the simulations, we show that a triplet Neptunian system is stable for at least 2 Gyr and that the stability would not be greatly influenced even if we varied the planetary masses. In addition, we employ Laplace-Lagrange secular theory to investigate the long-term behavior of the system, and the outcomes demonstrate that this theory can well describe and predict the secular orbital evolution for three Neptune-mass planets, where the secular periods and amplitudes of the eccentricities are in good agreement with those from direct numerical integrations. We first reveal that the secular periods of the eccentricity, e(1) and e(2), are identical. Moreover, we extensively explore the planetary configuration of three Neptune-mass companions with one massive terrestrial planet in 0.07 AU <= a <= 1.20 AU, to examine the potential asteroid architecture. We underline that there are stable zones lasting for at least 10(5) yr for low-mass terrestrial planets located between 0.3 and 0.5 AU and between 0.8 and 1.2 AU. We also find that the secular resonances can excite the eccentricities of the terrestrial bodies and that the accumulation or depletion of the asteroid belt is also shaped by orbital resonances of the outer planets; for example, the asteroidal gaps at the 2 : 1 and 3 : 2 mean motion resonances with planet c. In a dynamical sense, the proper candidate regions for the existence of potential terrestrial planets or habitable zones are 0.35 AU < a < 0.50 AU and 0.80 AU < a < 1.00 AU for relatively low eccentricities, implying the possible asteroidal structure in the system.
关键词Methods : N-body Simulations Planetary Systems Stars : Individual (Hd 69830 47 Uma 55 Cancri Hd 160691 Gj 876)
收录类别SCI
语种英语
WOS记录号WOS:000244928500034
引用统计
被引频次:18[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.bao.ac.cn/handle/114a11/8964
专题应用天文研究部
作者单位1.Chinese Acad Sci, Purple Mt Observ, Nanjing, Peoples R China
2.Chinese Acad Sci, Natl Astron Observ, Beijing, Peoples R China
3.Carnegie Inst Washington, Dept Terr Magnetism, Washington, DC 20015 USA
4.Natl Astron Observ, Tokyo 181, Japan
5.Nanjing Univ, Dept Astron, Nanjing 210008, Peoples R China
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Ji, Jianghui,Kinoshita, Hiroshi,Liu, Lin,et al. The secular evolution and dynamical architecture of the Neptunian triplet planetary system HD 69830[J]. ASTROPHYSICAL JOURNAL,2007,657(2):1092-1097.
APA Ji, Jianghui,Kinoshita, Hiroshi,Liu, Lin,&Li, Guangyu.(2007).The secular evolution and dynamical architecture of the Neptunian triplet planetary system HD 69830.ASTROPHYSICAL JOURNAL,657(2),1092-1097.
MLA Ji, Jianghui,et al."The secular evolution and dynamical architecture of the Neptunian triplet planetary system HD 69830".ASTROPHYSICAL JOURNAL 657.2(2007):1092-1097.
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