NEAR 3:2 AND 2:1 MEAN MOTION RESONANCE FORMATION IN THE SYSTEMS OBSERVED BY KEPLER

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	NEAR 3:2 AND 2:1 MEAN MOTION RESONANCE FORMATION IN THE SYSTEMS OBSERVED BY KEPLER
	Wang, Su; Ji, Jianghui
刊名	ASTROPHYSICAL JOURNAL
	2014-11-01
卷号	795 期号:1 页码:85
关键词	methods: numerical planetary systems planets and satellites: formation
ISSN号	0004-637X
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.
学科主题	天文和天体物理
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
公开日期	2015-05-22
内容类型	期刊论文
源URL	[http://libir.pmo.ac.cn/handle/332002/11569]
专题	紫金山天文台_行星科学与深空探测实验室
作者单位	Chinese Acad Sci, Key Lab Planetary Sci, Purple Mt Observ, Nanjing 210008, Peoples R China
推荐引用方式 GB/T 7714	Wang, Su,Ji, Jianghui. NEAR 3:2 AND 2:1 MEAN MOTION RESONANCE FORMATION IN THE SYSTEMS OBSERVED BY KEPLER[J]. ASTROPHYSICAL JOURNAL,2014,795(1):85.
APA	Wang, Su,&Ji, Jianghui.(2014).NEAR 3:2 AND 2:1 MEAN MOTION RESONANCE FORMATION IN THE SYSTEMS OBSERVED BY KEPLER.ASTROPHYSICAL JOURNAL,795(1),85.
MLA	Wang, Su,et al."NEAR 3:2 AND 2:1 MEAN MOTION RESONANCE FORMATION IN THE SYSTEMS OBSERVED BY KEPLER".ASTROPHYSICAL JOURNAL 795.1(2014):85.