PMO OpenIR  > 近地天体探测和太阳系天体研究团组
How to reach the orbital configuration of the inner three planets in HD 40307 planet system?
Chen YuanYuan1,2,3,4; Zhou JiLin1,2; Ma YueHua3,4
2015-03-01
Source PublicationSCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY
Volume58Issue:3Pages:39-601
AbstractThe 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.
KeywordPlanets And Satellites: Formation Planets And Satellites: Hd40307
Subject Area天文和天体物理
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1007/s11433-014-5579-x
WOS KeywordHOT SUPER-EARTHS ; TIDAL EVOLUTION ; DENSITY WAVES ; SOLAR-SYSTEM ; KEPLER ; MIGRATION ; RESONANCE ; LINDBLAD ; ORIGIN ; DISK
Indexed BySCI
Language英语
WOS Research AreaPhysics
WOS SubjectPhysics, Multidisciplinary
WOS IDWOS:000349813600015
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Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/14829
Collection近地天体探测和太阳系天体研究团组
Affiliation1.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
Recommended Citation
GB/T 7714
Chen YuanYuan,Zhou JiLin,Ma YueHua. How to reach the orbital configuration of the inner three planets in HD 40307 planet system?[J]. SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY,2015,58(3):39-601.
APA Chen YuanYuan,Zhou JiLin,&Ma YueHua.(2015).How to reach the orbital configuration of the inner three planets in HD 40307 planet system?.SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY,58(3),39-601.
MLA Chen YuanYuan,et al."How to reach the orbital configuration of the inner three planets in HD 40307 planet system?".SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY 58.3(2015):39-601.
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