The secular evolution and dynamical architecture of the Neptunian triplet planetary system HD 69830

CORC > 紫金山天文台 > 中国科学院紫金山天文台 > 太阳活动的多波段观测研究团组

	The secular evolution and dynamical architecture of the Neptunian triplet planetary system HD 69830
	Ji, Jianghui; Kinoshita, Hiroshi ; Liu, Lin ; Li, Guangyu
刊名	ASTROPHYSICAL JOURNAL
	2007-03-10
卷号	657 期号:2 页码:1092-1097
关键词	methods : n-body simulations planetary systems stars : individual (HD 69830, 47 UMa, 55 Cancri, HD 160691, GJ 876)
ISSN号	0004-637X
英文摘要	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.
学科主题	Astronomy & Astrophysics
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
关键词[WOS]	MAIN-SEQUENCE STARS ; MASS PLANETS ; EXTRASOLAR PLANETS ; BINARY-SYSTEMS ; HABITABLE ZONE ; SOLAR-SYSTEM ; STABILITY ; TELESCOPE ; RESONANCE ; GJ-876
收录类别	SCI
语种	英语
WOS记录号	WOS:000244928500034
公开日期	2012-02-05
内容类型	期刊论文
源URL	[http://159.226.72.40/handle/332002/2476]
专题	紫金山天文台_太阳活动的多波段观测研究团组
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
推荐引用方式 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.