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题名: How to reach the orbital configuration of the inner three planets in HD 40307 planet system?
作者: Chen YuanYuan(陈媛媛)1, 2, 3, 4; Zhou JiLin1, 2; Ma YueHua(马月华)3, 4
刊名: SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY
出版日期: 2015-03-01
卷号: 58, 期号:3, 页码:39-601
关键词: planets and satellites: formation ; planets and satellites: HD40307
学科分类: 天文和天体物理
DOI: 10.1007/s11433-014-5579-x
文章类型: Article
英文摘要: The formation of the present configuration of three hot super-Earths in the planet system HD 40307 is a challenge to dynamical astronomers. With the two successive period ratios both near and slightly larger than 2, the system may have evolved from pairwise 2:1 mean motion resonances (MMRs). In this paper, we investigate the evolutions of the period ratios of the three planets after the primordial gas disk was depleted. Three routines are found to probably result in the current configuration under tidal dissipation with the center star, they are: (i) through apsidal alignment only; (ii) out of pairwise 2:1 MMRs, then through apsidal alignment; (iii) out of the 4:2:1 Laplace Resonance (LR), then through apsidal alignment. All the three scenarios require the initial eccentricities of planets similar to 0.15, which implies a planetary scattering history during and after the gas disk was depleted. All the three routines will go through the apsidal alignment phase, and enter a state with near-zero eccentricities finally. We also find some special characteristics for each routine. If the system went through pairwise 2:1 MMRs at the beginning, the MMR of the outer two planets would be broken first to reach the current state. As for routine (iii), the planets would be out of the LR at the place where some high-order resonances are located. At the high-order resonances 17:8 or 32:15 of the planets c and d, the system will possibly enter the current state as the final equilibrium.
WOS标题词: Science & Technology ; Physical Sciences
类目[WOS]: Physics, Multidisciplinary
研究领域[WOS]: Physics
关键词[WOS]: HOT SUPER-EARTHS ; TIDAL EVOLUTION ; DENSITY WAVES ; SOLAR-SYSTEM ; KEPLER ; MIGRATION ; RESONANCE ; LINDBLAD ; ORIGIN ; DISK
收录类别: SCI
所属项目名称: PMO_LIB-IR
语种: 英语
WOS记录号: WOS:000349813600015
Citation statistics:
内容类型: 期刊论文
URI标识: http://libir.pmo.ac.cn/handle/332002/14829
Appears in Collections:近地天体探测和太阳系天体研究团组_期刊论文

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作者单位: 1.Nanjing Univ, Dept Astron, Minist Educ, Nanjing 210093, Jiangsu, Peoples R China
2.Nanjing Univ, Key Lab Modern Astron & Astrophys, Minist Educ, Nanjing 210093, Jiangsu, Peoples R China
3.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Peoples R China
4.Chinese Acad Sci, Key Lab Planetary Sci, Nanjing 210008, Peoples R China
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