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NEAR 3:2 AND 2:1 MEAN MOTION RESONANCE FORMATION IN THE SYSTEMS OBSERVED BY KEPLER
Wang, Su; Ji, Jianghui
2014-11-01
Source PublicationASTROPHYSICAL JOURNAL
ISSN0004-637X
Volume795Issue:1Pages:85
AbstractThe 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.
KeywordMethods: Numerical Planetary Systems Planets And Satellites: Formation
Subject Area天文和天体物理
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1088/0004-637X/795/1/85
WOS KeywordPLANETARY SYSTEM ; TERRESTRIAL PLANETS ; DETERMINISTIC MODEL ; EXTRASOLAR PLANETS ; SUPER-EARTHS ; MIGRATION ; ORIGIN ; ACCRETION ; STARS ; CONSTRAINTS
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000343857300085
Citation statistics
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/11569
Collection行星科学与深空探测实验室
AffiliationChinese Acad Sci, Key Lab Planetary Sci, Purple Mt Observ, Nanjing 210008, Peoples R China
Recommended Citation
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.
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