An Integrative Analysis of the HD 219134 Planetary System and the Inner Solar System: Extending DYNAMITE with Enhanced Orbital Dynamical Stability Criteria
arXiv:2112.05337 · doi:10.3847/1538-3881/ac4166
Abstract
Planetary architectures remain unexplored for the vast majority of exoplanetary systems, even among the closest ones, with potentially hundreds of planets still ``hidden" from our knowledge. DYNAMITE is a powerful software package that can predict the presence and properties of these yet undiscovered planets. We have significantly expanded the integrative capabilities of DYNAMITE, which now allows for (i) planets of unknown inclinations alongside planets of known inclinations, (ii) population statistics and model distributions for the eccentricity of planetary orbits, and (iii) three different dynamical stability criteria. We demonstrate the new capabilities with a study of the HD 219134 exoplanet system consisting of four confirmed planets and two likely candidates, where five of the likely planets are Neptune-size or below with orbital periods less than 100 days. By integrating the known data for the HD 219134 planetary system with contextual and statistical exoplanet population information, we tested different system architecture hypotheses to determine their likely dynamical stability. Our results provide support for the planet candidates, and we predict at least two additional planets in this system. We also deploy DYNAMITE on analogs of the inner Solar System by excluding Venus or Earth from the input parameters to test DYNAMITE's predictive power. Our analysis finds the system remains stable while also recovering the excluded planets, demonstrating the increasing capability of DYNAMITE to accurately and precisely model the parameters of additional planets in multi-planet systems.
References in corpus (35)
- SciPy 1.0--Fundamental Algorithms for Scientific Computing in Python
- Array Programming with NumPy
- Gaia Data Release 2. Summary of the contents and survey properties
- The Transiting Exoplanet Survey Satellite
- Habitable Zones Around Main-Sequence Stars: New Estimates
- Seven temperate terrestrial planets around the nearby ultracool dwarf star TRAPPIST-1
- REBOUND: An open-source multi-purpose N-body code for collisional dynamics
- Architecture of Kepler's Multi-transiting Systems: II. New investigations with twice as many candidates
- Stellar Diameters and Temperatures II. Main Sequence K & M Stars
- Contributions to the Nearby Stars (NStars) Project: Spectroscopy of Stars Earlier than M0 within 40 parsecs: The Northern Sample I
- Kepler-36: A Pair of Planets with Neighboring Orbits and Dissimilar Densities
- Structure and Evolution of Nearby Stars with Planets II. Physical Properties of ~1000 Cool Stars from the SPOCS Catalog
- The orbital eccentricity of small planet systems
- The Exoplanet Population Observation Simulator. I - The Inner Edges of Planetary Systems
- Revisited Mass-Radius relations for exoplanets below 120 Earth masses
- Exoplanet Orbital Eccentricities Derived From LAMOST-Kepler Analysis
- The HARPS-N Rocky Planet Search I. HD219134b: A transiting rocky planet in a multi-planet system at 6.5 pc from the Sun
- Hybrid Symplectic Integrators for Planetary Dynamics
- AMD-stability and the classification of planetary systems
- Planets Near Mean-Motion Resonances
- Architectures of Exoplanetary Systems. I: A Clustered Forward Model for Exoplanetary Systems around Kepler's FGK Stars
- Predicting the long-term stability of compact multiplanet systems
- Architectures of Exoplanetary Systems. III: Eccentricity and Mutual Inclination Distributions of AMD-stable Planetary Systems
- Two massive rocky planets transiting a K-dwarf 6.5 parsecs away
- A Six-Planet System Orbiting HD 219134
- CKS VIII: Eccentricities of Kepler Planets and Tentative Evidence of a High Metallicity Preference for Small Eccentric Planets
- An information theoretic framework for classifying exoplanetary system architectures
- Planetary migration and the origin of the 2:1 and 3:2 (near)-resonant population of close-in exoplanets
- Survival of non-coplanar, closely-packed planetary systems after a close encounter
- The Mass Distribution Function of Planets
- Dynamical instabilities in systems of multiple short-period planets are likely driven by secular chaos: a case study of Kepler-102
- A 12-Year Activity Cycle for HD 219134
- Hidden Worlds: Dynamical Architecture Predictions of Undetected Planets in Multi-planet Systems and Applications to TESS Systems
- An Integrated Analysis with Predictions on the Architecture of the tau Ceti Planetary System, Including a Habitable Zone Planet
- K2-138 g: Spitzer Spots a Sixth Planet for the Citizen Science System