Enhanced Size Uniformity for Near-resonant Planets
arXiv:2307.15875 · doi:10.3847/1538-4357/acebe2
Abstract
Super-Earths within the same close-in, compact planetary system tend to exhibit a striking degree of uniformity in their radius, mass, and orbital spacing, and this 'peas-in-a-pod' phenomenon itself serves to provide one of the strongest constrains on planet formation at large. While it has been recently demonstrated from independent samples that such planetary uniformity occurs for both configurations near and distant from mean motion resonance, the question thus remains if the strength of this uniformity itself differs between near-resonant and nonresonant configurations such that the two modes may be astrophysically distinct in their evolution. We thus provide in this work a novel comparative size uniformity analysis for 48 near-resonant and 251 nonresonant multi-planet systems from the California Kepler Survey catalog, evaluating uniformity both across systems and between planetary pairs within the same system. We find that while multiplanet configurations exhibit strong peas-in-a-pod size uniformity regardless of their proximity to resonance, near-resonant configurations display enhanced intra-system size uniformity as compared to their analogous nonresonant counterparts at the level of both entire systems and subsystem planetary pairs and chains. These results are broadly consistent with a variety of formation paradigms for multiplanet systems, such as convergent migration within a turbulent protoplanetary disk or planet-planet interactions incited by postnebular dynamical instabilities. Nevertheless, further investigation is necessary to ascertain whether the nonresonant and near-resonant planetary configurations respectively evolve via a singular process or mechanisms that are dynamically distinct.
arXiv comment15 pages, 6 figures. Accepted to ApJ July 2023
References in corpus (54)
- Gaia Data Release 2. Summary of the contents and survey properties
- Characteristics of planetary candidates observed by Kepler, II: Analysis of the first four months of data
- Architecture of Kepler's Multi-transiting Systems: II. New investigations with twice as many candidates
- The Mass-Radius Relation for 65 Exoplanets Smaller than 4 Earth Radii
- KEPLER's First Rocky Planet: Kepler-10b
- The California Kepler Survey VII. Precise Planet Radii Leveraging Gaia DR2 Reveal the Stellar Mass Dependence of the Planet Radius Gap
- An asteroseismic view of the radius valley: stripped cores, not born rocky
- Planetary Candidates Observed by Kepler. VIII. A Fully Automated Catalog With Measured Completeness and Reliability Based on Data Release 25
- Breaking the Chains: Hot Super-Earth systems from migration and disruption of compact resonant chains
- Migration and the formation of systems of hot super-Earths and Neptunes
- A seven-planet resonant chain in TRAPPIST-1
- The California-Kepler Survey V. Peas in a Pod: Planets in a Kepler Multi-planet System are Similar in Size and Regularly Spaced
- The California-Kepler Survey. I. High Resolution Spectroscopy of 1305 Stars Hosting Kepler Transiting Planets
- Exoplanet Orbital Eccentricities Derived From LAMOST-Kepler Analysis
- A resonant chain of four transiting, sub-Neptune planets
- Kepler Planet Masses and Eccentricities from TTV Analysis
- Resonant Repulsion of Kepler Planet Pairs
- Six transiting planets and a chain of Laplace resonances in TOI-178
- The California-Kepler Survey. II. Precise Physical Properties of 2025 Kepler Planets and Their Host Stars
- Kepler Multi-Planet Systems Exhibit Unexpected Intra-system Uniformity in Mass and Radius
- A Dynamical Analysis of the Kepler-80 System of Five Transiting Planets
- Analytical Treatment of Planetary Resonances
- Planetesimal Interactions Can Explain the Mysterious Period Ratios of Small Near-Resonant Planets
- Stealing the Gas: Giant Impacts and the Large Diversity in Exoplanet Densities
- Obliquity-Driven Sculpting of Exoplanetary Systems
- Architectures of Exoplanetary Systems. III: Eccentricity and Mutual Inclination Distributions of AMD-stable Planetary Systems
- Transit Timing Variation of Near-Resonance Planetary Pairs: Confirmation of Twelve Multiple Planet Systems
- Atmospheric mass loss due to giant impacts: the importance of the thermal component for hydrogen-helium envelopes
- Objects in Kepler's Mirror May be Larger Than They Appear: Bias and Selection Effects in Transiting Planet Surveys
- Spin-orbit Misalignment as a Driver of the Kepler Dichotomy
- 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
- Transit Timing Observations from Kepler: VI. Potentially interesting candidate systems from Fourier-based statistical tests
- TOI-1136 is a Young, Coplanar, Aligned Planetary System in a Pristine Resonant Chain
- An information theoretic framework for classifying exoplanetary system architectures
- Dissipation in planar resonant planetary systems
- Architectures of Compact Super-Earth Systems Shaped by Instabilities
- Sensitivity bias in the mass-radius distribution from Transit Timing Variations and Radial Velocity measurements
- The California-Kepler Survey. VI: Kepler Multis and Singles Have Similar Planet and Stellar Properties Indicating a Common Origin
- An Analytic Criterion for Turbulent Disruption of Planetary Resonances
- The Kepler Peas in a Pod Pattern is Astrophysical
- Energy Optimization in Extrasolar Planetary Systems: The Transition from Peas-in-a-Pod to Runaway Growth
- Sub-Neptune Formation: The View from Resonant Planets
- Breaking Resonant Chains: Destabilization of Resonant Planets due to Long-term Mass Evolution
- Terrestrial planet formation by torque-driven convergent migration of planetary embryos
- Unbiasing the density of TTV-characterised sub-Neptunes: Update of the mass-radius relationship of 34 Kepler planets
- First-order mean motion resonances in two-planet systems: general analysis and observed systems
- Intra-system uniformity: a natural outcome of dynamical sculpting
- Chains of Planets in Mean Motion Resonances Arising from Oligarchic Growth
- Dynamics and Origins of the Near-Resonant Kepler Planets
- Generalized Peas-in-a-Pod: Extending Intra-System Mass Uniformity to Non-TTV Systems via the Gini Index
- Exciting the TTV Phases of Resonant Sub-Neptunes
- The resilience of Kepler systems to stellar obliquity
- Energy Optimization in Binary Star Systems: Explanation for Equal Mass Members in Close Orbits
Cited by in corpus (4)
- Resonant sub-Neptunes are puffier
- Tidally Heated Sub-Neptunes, Refined Planetary Compositions, and Confirmation of a Third Planet in the TOI-1266 System
- The GAPS Programme at TNG. LIX. A characterisation study of the 300 Myr old multi-planetary system orbiting the star BD+40 2790 (TOI-2076)
- Evidence that Planets in the Radius Gap Do Not Resemble Their Neighbors