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题名: NEAR 3:2 AND 2:1 MEAN MOTION RESONANCE FORMATION IN THE SYSTEMS OBSERVED BY KEPLER
作者: Wang Su(王素)1; Ji JiangHui(季江徽)1
刊名: ASTROPHYSICAL JOURNAL
出版日期: 2014-11-01
卷号: 795, 期号:1, 页码:85
关键词: methods: numerical ; planetary systems ; planets and satellites: formation
学科分类: 天文和天体物理
DOI: 10.1088/0004-637X/795/1/85
文章类型: Article
英文摘要: The Kepler mission has released similar to 4229 transiting planet candidates. There are approximately 222 candidate systems with three planets. Among them, the period ratios of planet pairs near 1.5 and 2.0 reveal that two peaks exist for which the proportions of the candidate systems are similar to 7.0% and 18.0%, respectively. In this work, we study the formation of mean motion resonance (MMR) systems, particularly for the planetary configurations near 3:2 and 2:1 MMRs, and we concentrate on the interplay between the resonant configuration and the combination of stellar accretion rate, stellar magnetic field, speed of migration, and additional planets. We perform more than 1000 runs by assuming a system with a solar-like star and three surrounding planets. From the statistical results, we find that under the formation scenario, the proportions near 1.5 and 2.0 can reach 14.5% and 26.0%, respectively. In addition, (M) over dot = 0.1 x 10(-8) M-circle dot yr(-1) is propitious toward the formation of 3:2 resonance, whereas (M) over dot = 2 x 10(-8) M-circle dot yr(-1) contributes to the formation of 2:1 resonance. The speed-reduction factor of type I migration f(1) >= 0.3 facilitates 3:2 MMRs, whereas f(1) >= 0.1 facilitates 2:1 MMRs. If additional planets are present in orbits within the innermost or beyond the outermost planet in a three-planet system, 3:2:1 MMRs can be formed, but the original systems trapped in 4:2:1 MMRs are not affected by the supposed planets. In summary, we conclude that this formation scenario will provide a likely explanation for Kepler candidates involved in 2:1 and 3:2 MMRs.
WOS标题词: Science & Technology ; Physical Sciences
类目[WOS]: Astronomy & Astrophysics
研究领域[WOS]: Astronomy & Astrophysics
关键词[WOS]: PLANETARY SYSTEM ; TERRESTRIAL PLANETS ; DETERMINISTIC MODEL ; EXTRASOLAR PLANETS ; SUPER-EARTHS ; MIGRATION ; ORIGIN ; ACCRETION ; STARS ; CONSTRAINTS
收录类别: SCI
语种: 英语
WOS记录号: WOS:000343857300085
Citation statistics:
内容类型: 期刊论文
URI标识: http://libir.pmo.ac.cn/handle/332002/11569
Appears in Collections:行星科学与深空探测实验室_期刊论文

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作者单位: 1.Chinese Acad Sci, Key Lab Planetary Sci, Purple Mt Observ, Nanjing 210008, Peoples R China

Recommended Citation:
Wang, Su; Ji, Jianghui.NEAR 3:2 AND 2:1 MEAN MOTION RESONANCE FORMATION IN THE SYSTEMS OBSERVED BY KEPLER,ASTROPHYSICAL JOURNAL,2014,795(1):85
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