SIMBAD references

2019AJ....157..166J - Astron. J., 157, 166-166 (2019/April-0)

The origin of Kepler-419b: a path to tidal migration via four-body secular interactions.


Abstract (from CDS):

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 7 mJup, semimajor axes between 4 and 7.5 au, eccentricities between 0.18 and 0.35, and mutual inclinations near 0°) 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.

Abstract Copyright: © 2019. The American Astronomical Society. All rights reserved.

Journal keyword(s): planets and satellites: dynamical evolution and stability - planets and satellites: individual Kepler-419

Simbad objects: 7

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