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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
Source PublicationASTROPHYSICAL JOURNAL
Volume657Issue:2Pages:1092-1097
AbstractWe 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.
KeywordMethods : N-body Simulations Planetary Systems Stars : Individual (Hd 69830 47 Uma 55 Cancri Hd 160691 Gj 876)
Indexed BySCI
Language英语
WOS IDWOS:000244928500034
Citation statistics
Cited Times:19[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/8964
Collection应用天文研究部
Affiliation1.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
Recommended Citation
GB/T 7714
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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