期刊
ASTRONOMICAL JOURNAL
卷 157, 期 4, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.3847/1538-3881/ab09eb
关键词
planets and satellites: dynamical evolution and stability; planets and satellites: individual (Kepler-419)
资金
- NASA Exoplanets Research Program [NNX16AB50G]
- Alfred P. Sloan Foundation's Sloan Research Fellowship
- Pennsylvania State University
- Eberly College of Science
- Pennsylvania Space Grant Consortium
- NASA [907852, NNX16AB50G] Funding Source: Federal RePORTER
We test the high-eccentricity tidal migration scenario for Kepler-419b, a member of the eccentric warm Jupiter class of planets whose origin is debated. Kepler-419 hosts two known planets (b,c). However, in its current configuration, planet c cannot excite the eccentricity of planet b enough to undergo high-eccentricity tidal migration. We investigate whether the presence of an undiscovered fourth body could explain the orbit of Kepler-419b. We explore the parameter space of this potential third giant planet using a suite of N-body simulations with a range of initial conditions. From the results of these simulations, coupled with observational constraints, we can rule out this mechanism for much of the parameter space of the initial object d conditions. However, for a small range of parameters (masses between 0.5 and m(Jup ), semimajor axes between 4 and 7.5 au, eccentricities between 0.18 and 0.35, and mutual inclinations near 0 degrees) an undiscovered object d could periodically excite the eccentricity of Kepler-419b without destabilizing the system over 1 Gyr while producing currently undetectable radial velocity and transit timing variation signals.
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