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PREDICTING THE CONFIGURATION OF A PLANETARY SYSTEM: KOI-152 OBSERVED BY KEPLER
Wang, Su1; Ji, Jianghui1; Zhou, Ji-Lin2,3
2012-07-10
Source PublicationASTROPHYSICAL JOURNAL
ISSN0004-637X
Volume753Issue:2Pages:170(10pp)
AbstractThe recent Kepler discovery of KOI-152 reveals a system of three hot super-Earth candidates that are in or near a 4:2:1 mean motion resonance. It is unlikely that they formed in situ; the planets probably underwent orbital migration during the formation and evolution process. The small semimajor axes of the three planets suggest that migration stopped at the inner edge of the primordial gas disk. In this paper, we focus on the influence of migration halting mechanisms, including migration "dead zones," and inner truncation by the stellar magnetic field. We show that the stellar accretion rate, stellar magnetic field, and the speed of migration in the protoplanetary disk are the main factors affecting the final configuration of KOI-152. Our simulations suggest that three planets may be around a star with low star accretion rate or with high magnetic field. On the other hand, slow type I migration, which decreases to one-tenth of the linear analysis results, favors forming the configuration of KOI-152. Under such a formation scenario, the planets in the system are not massive enough to open gaps in the gas disk. The upper limits of the planetary masses are estimated to be about 15, 19, and 24M(circle plus), respectively. Our results are also indicative of the near Laplacian configurations that are quite common in planetary systems.
KeywordPlanetary Systems Planets And Satellites: Formation Stars: Individual (Kic 8394721)
Subject AreaAstronomy & Astrophysics
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1088/0004-637X/753/2/170
WOS KeywordEARTH-LIKE PLANETS ; HOT SUPER-EARTHS ; 1ST 4 MONTHS ; GIANT PLANETS ; PROTOPLANETARY DISKS ; DETERMINISTIC MODEL ; ORBITING GJ-876 ; MIGRATION ; ACCRETION ; STARS
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000305912700077
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Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/8126
Collection行星科学与深空探测实验室
Affiliation1.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Jiangsu, Peoples R China
2.Nanjing Univ, Dept Astron, Nanjing 210093, Jiangsu, Peoples R China
3.Nanjing Univ, Key Lab Modern Astron & Astrophys, Minist Educ, Nanjing 210093, Jiangsu, Peoples R China
Recommended Citation
GB/T 7714
Wang, Su,Ji, Jianghui,Zhou, Ji-Lin. PREDICTING THE CONFIGURATION OF A PLANETARY SYSTEM: KOI-152 OBSERVED BY KEPLER[J]. ASTROPHYSICAL JOURNAL,2012,753(2):170(10pp).
APA Wang, Su,Ji, Jianghui,&Zhou, Ji-Lin.(2012).PREDICTING THE CONFIGURATION OF A PLANETARY SYSTEM: KOI-152 OBSERVED BY KEPLER.ASTROPHYSICAL JOURNAL,753(2),170(10pp).
MLA Wang, Su,et al."PREDICTING THE CONFIGURATION OF A PLANETARY SYSTEM: KOI-152 OBSERVED BY KEPLER".ASTROPHYSICAL JOURNAL 753.2(2012):170(10pp).
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