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- W3103589548 abstract "The 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 proto-planetary 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 formation scenario, the planets in the system are not massive enough to open gaps in the gas disk. The upper limit of the planetary masses are estimated to be about $15,~19$, and $24 M_oplus$, respectively. Our results are also indicative of the near Laplacian configurations that are quite common in planetary systems." @default.
- W3103589548 created "2020-11-23" @default.
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- W3103589548 date "2012-06-26" @default.
- W3103589548 modified "2023-10-16" @default.
- W3103589548 title "PREDICTING THE CONFIGURATION OF A PLANETARY SYSTEM: KOI-152 OBSERVED BYKEPLER" @default.
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- W3103589548 doi "https://doi.org/10.1088/0004-637x/753/2/170" @default.
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