Kepler-80 Revisited: Assessing the Participation of a Newly Discovered Planet in the Resonant Chain
arXiv:2212.08695 · doi:10.3847/1538-3881/acac80
Abstract
In this paper, we consider the chain of resonances in the Kepler-80 system and evaluate the impact that the additional member of the resonant chain discovered by Shallue & Vanderburg (2018) has on the dynamics of the system and the physical parameters that can be recovered by a fit to the transit timing variations (TTVs). Ultimately, we calculate the mass of Kepler-80 g to be when assuming all planets have zero eccentricity, and when relaxing that assumption. We show that the outer five planets are in successive three-body mean-motion resonances (MMRs). We assess the current state of two-body MMRs in the system and find that the planets do not appear to be in two-body MMRs. We find that while the existence of the additional member of the resonant chain does not significantly alter the character of the Kepler-80 three-body MMRs, it can alter the physical parameters derived from the TTVs, suggesting caution should be applied when drawing conclusions from TTVs for potentially incomplete systems. We also compare our results to those of MacDonald et al. (2021), who perform a similar analysis on the same system with a different method. Although the results of this work and MacDonald et al. (2021) show that different fit methodologies and underlying assumptions can result in different measured orbital parameters, the most secure conclusion is that which holds true across all lines of analysis: Kepler-80 contains a chain of planets in three-body MMRs but not in two-body MMRs.
arXiv commentAccepted to AJ
References in corpus (55)
- emcee: The MCMC Hammer
- Seven temperate terrestrial planets around the nearby ultracool dwarf star TRAPPIST-1
- On detecting terrestrial planets with timing of giant planet transits
- DHP Framework: Digital Health Passports Using Blockchain -- Use case on international tourism during the COVID-19 pandemic
- Temperate Earth-sized planets transiting a nearby ultracool dwarf star
- A torque formula for non-isothermal Type I planetary migration - I. Unsaturated horseshoe drag
- Migration and the formation of systems of hot super-Earths and Neptunes
- A seven-planet resonant chain in TRAPPIST-1
- Identifying Exoplanets with Deep Learning: A Five Planet Resonant Chain around Kepler-80 and an Eighth Planet around Kepler-90
- Extracting Planet Mass and Eccentricity From TTV data
- emcee v3: A Python ensemble sampling toolkit for affine-invariant MCMC
- REBOUNDx: A Library for Adding Conservative and Dissipative Forces to Otherwise Symplectic N-body Integrations
- A resonant chain of four transiting, sub-Neptune planets
- First order resonance overlap and the stability of close two planet systems
- Six transiting planets and a chain of Laplace resonances in TOI-178
- Observable Consequences of Planet Formation Models in Systems with Close-in Terrestrial Planets
- On disc driven inward migration of resonantly coupled planets with application to the system around GJ876
- The Detection and Characterization of a Nontransiting Planet by Transit Timing Variations
- KOI-142, the King of Transit Variations, is a Pair of Planets near the 2:1 Resonance
- TTVFast: An efficient and accurate code for transit timing inversion problems
- A Dynamical Analysis of the Kepler-80 System of Five Transiting Planets
- Period ratios in multi-planetary systems discovered by Kepler are consistent with planet migration
- Transit Timing Observations from Kepler: I. Statistical Analysis of the First Four Months
- Transit Timing Variation of Near-Resonance Planetary Pairs. II. Confirmation of 30 planets in 15 Multiple Planet Systems
- Three-dimensional Disk-Planet Torques in a Locally Isothermal Disk
- Measurement of planet masses with transit timing variations due to synodic "chopping" effects
- On the migration-induced resonances in a system of two planets with masses in the Earth mass range
- Stellar irradiated discs and implications on migration of embedded planets II: accreting-discs
- Convergent Migration Renders TRAPPIST-1 Long-lived
- The stability of tightly-packed, evenly-spaced systems of Earth-mass planets orbiting a Sun-like star
- A 1.9 Earth radius rocky planet and the discovery of a non-transiting planet in the Kepler-20 system
- The Laplace resonance in the Kepler-60 system
- The K2-138 System: A Near-Resonant Chain of Five Sub-Neptune Planets Discovered by Citizen Scientists
- TOI-1136 is a Young, Coplanar, Aligned Planetary System in a Pristine Resonant Chain
- Diffuser-Assisted Infrared Transit Photometry for Four Dynamically Interacting \textit{Kepler} Systems
- Photo-dynamical mass determination of the multi-planetary system K2-19
- The formation of systems with closely spaced low-mass planets and the application to Kepler-36
- Analytical model of multi-planetary resonant chains and constraints on migration scenarios
- Stellar irradiated discs and implications on migration of embedded planets III: viscosity transitions
- Convergence zones for Type I migration: an inward shift for multiple planet systems
- Origin Scenarios for the Kepler 36 Planetary System
- Capture into first-order resonances and long-term stability of pairs of equal-mass planets
- A Criterion for the Stability of Planets in Chains of Resonances
- Mean motion resonances at high eccentricities: the 2:1 and the 3:2 interior resonances
- Effects of Turbulence, Eccentricity Damping, and Migration Rate on the Capture of Planets into Mean Motion Resonance
- Three Pathways for Observed Resonant Chains
- Chains of Planets in Mean Motion Resonances Arising from Oligarchic Growth
- On the impact of tides on the transit-timing fits to the TRAPPIST-1 system
- A Five-Planet Resonant Chain: Reevaluation of the Kepler-80 System
- Resonance in the K2-19 system is at odds with its high reported eccentricities
- A Tidal Origin for a 3-body Resonance in Kepler-221
- The Discovery of the Long-Period, Eccentric Planet Kepler-88 d and System Characterization with Radial Velocities and Photodynamical Analysis
- Breaking mean-motion resonances during Type I planet migration
- Apsidal Alignment and Anti-Alignment of Planets in Mean-Motion Resonance: Disk-Driven Migration and Eccentricity Driving
- On the influence of equilibrium tides on transit-timing variations of close-in super-Earths. I. Application to single-planet systems and the case of K2-265 b