KOI-142, the King of Transit Variations, is a Pair of Planets near the 2:1 ResonanceReportar como inadecuado



 KOI-142, the King of Transit Variations, is a Pair of Planets near the 2:1 Resonance


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The Transit Timing Variations TTVs can be used as a diagnostic of gravitational interactions between planets in a multi-planet system. Many Kepler Objects of Interest KOIs exhibit significant TTVs, but KOI-142.01 stands out among them with an unrivaled, 12-hour TTV amplitude. Here we report a thorough analysis of KOI-142.01s transits. We discover periodic Transit Duration Variations TDVs of KOI-142.01 that are nearly in phase with the observed TTVs. We show that KOI-142.01s TTVs and TDVs uniquely detect a non-transiting companion with a mass 0.7 that of Jupiter KOI-142c. KOI-142.01s mass inferred from the transit variations is consistent with the measured transit depth, suggesting a Neptune class planet KOI-142b. The orbital period ratio P c-P b=2.03 indicates that the two planets are just wide of the 2:1 resonance. The present dynamics of this system, characterized here in detail, can be used to test various formation theories that have been proposed to explain the near-resonant pairs of exoplanets.



Autor: David Nesvorny; David Kipping; Dirk Terrell; Joel Hartman; Gaspar A. Bakos; Lars A. Buchhave

Fuente: https://archive.org/



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