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• W2045483442 startingPage "32" @default.
• W2045483442 abstract "A significant fraction of Kepler systems are closely packed, largely coplanar, and circular. We study the stability of a six-planet system, Kepler-11, to gain insights on the dynamics and formation history of such systems. Using a technique called frequency maps as fast indicators of long-term stability, we explore the stability of the Kepler-11 system by analyzing the neighborhood space around its orbital parameters. Frequency maps provide a visual representation of chaos and stability, and their dependence on orbital parameters. We find that the current system is stable, but lies within a few percent of several dynamically dangerous two-body mean-motion resonances. Planet eccentricities are restricted below a small value, ∼0.04, for long-term stability, but planet masses can be more than twice their reported values (thus allowing for the possibility of mass loss by past photoevaporation). Based on our frequency maps, we speculate on the origin of instability in closely packed systems. We then proceed to investigate how the system could have been assembled. The stability constraints on Kepler-11 (mainly eccentricity constraints) suggest that if the system were assembled in situ, a dissipation mechanism must have been at work to neutralize the eccentricity excitation. On the other hand, if migration was responsible for assembling the planets, there has to be little differential migration among the planets to avoid them either getting trapped into mean motion resonances, or crashing into each other." @default.
• W2045483442 created "2016-06-24" @default.
• W2045483442 creator A5016015356 @default.
• W2045483442 creator A5080874318 @default.
• W2045483442 date "2014-10-09" @default.
• W2045483442 modified "2023-09-27" @default.
• W2045483442 title "STABILITY OF THE KEPLER-11 SYSTEM AND ITS ORIGIN" @default.
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• W2045483442 doi "https://doi.org/10.1088/0004-637x/795/1/32" @default.
• W2045483442 hasPublicationYear "2014" @default.
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