Sculpting the circumbinary planet size distribution through resonant interactions with companion planets
arXiv:2202.11719 · doi:10.1093/mnras/stac741
Abstract
Resonant locking of two planets is an expected outcome of convergent disc migration. The planets subsequently migrate together as a resonant pair. In the context of circumbinary planets, the disc is truncated internally by the binary. If there were only a single planet, then this inner disc edge would provide a natural parking location. However, for two planets migrating together in resonance there will be a tension between the inner planet stopping at the disc edge, and the outer planet continuing to be torqued inwards. In this paper we study this effect, showing that the outcome is a function of the planet-planet mass ratio. Smaller outer planets tend to be parked in a stable exterior 2:1 or 3:2 resonance with the inner planet, which itself remains near the disc edge. Equal or larger mass outer planets tend to push the inner planet past the disc edge and too close to the binary, causing it to be ejected or sometimes flipped to an exterior orbit. Our simulations show that this process may explain an observed dearth of small (< 3 Earth radii) circumbinary planets, since small planets are frequently ejected or left on long-period orbits, for which transit detection is less likely. This may also be an efficient mechanism for producing free-floating planets and interstellar interlopers like `Oumuamua.
arXiv commentAccepted by MNRAS March 14 2021 after second submission
References in corpus (90)
- The California-Kepler Survey. III. A Gap in the Radius Distribution of Small Planets
- Shrinking binary and planetary orbits by Kozai cycles with tidal friction
- REBOUND: An open-source multi-purpose N-body code for collisional dynamics
- Long-Term Stability of Planets in Binary Systems
- Prevalence of Earth-size planets orbiting Sun-like stars
- DHP Framework: Digital Health Passports Using Blockchain -- Use case on international tourism during the COVID-19 pandemic
- On detecting terrestrial planets with timing of giant planet transits
- Mass-Radius Relationships for Solid Exoplanets
- Planet-disk interaction and orbital evolution
- Origins of Hot Jupiters
- A torque formula for non-isothermal Type I planetary migration - II. Effects of diffusion
- Unbound or Distant Planetary Mass Population Detected by Gravitational Microlensing
- WHFast: A fast and unbiased implementation of a symplectic Wisdom-Holman integrator for long term gravitational simulations
- The Minimum-Mass Extrasolar Nebula: In-Situ Formation of Close-In Super-Earths
- Kepler-47: A Transiting Circumbinary Multi-Planet System
- Migration and the formation of systems of hot super-Earths and Neptunes
- No large population of unbound or wide-orbit Jupiter-mass planets
- The California-Kepler Survey V. Peas in a Pod: Planets in a Kepler Multi-planet System are Similar in Size and Regularly Spaced
- Breeding Super-Earths and Birthing Super-Puffs in Transitional Disks
- Testing In Situ Assembly with the Kepler Planet Candidate Sample
- Multiple-Planet Scattering and the Origin of Hot Jupiters
- REBOUNDx: A Library for Adding Conservative and Dissipative Forces to Otherwise Symplectic N-body Integrations
- Hot Jupiters in binary star systems
- The Formation of Super-Earths and Mini-Neptunes with Giant Impacts
- Tidal Truncation of Inclined Circumstellar and Circumbinary Discs in Young Stellar Binaries
- How not to build Tatooine: the difficulty of in situ formation of circumbinary planets Kepler 16b, Kepler 34b and Kepler 35b
- Magnetospheric Truncation, Tidal Inspiral, and the Creation of Short and Ultra-Short Period Planets
- Evolution of Planetary Systems in Resonance
- On the Abundance of Circumbinary Planets
- Planet-Planet Scattering Alone Cannot Explain the Free-Floating Planet Population
- On the formation and migration of giant planets in circumbinary discs
- Predictions of the Nancy Grace Roman Space Telescope Galactic Exoplanet Survey II: Free-Floating Planet Detection Rates
- The period ratio distribution of Kepler's candidate multiplanet systems
- The First Circumbinary Planet Found by Microlensing: OGLE-2007-BLG-349L(AB)c
- Planets Transiting Non-Eclipsing Binaries
- Period ratios in multi-planetary systems discovered by Kepler are consistent with planet migration
- Resonance Overlap is Responsible for Ejecting Planets in Binary Systems
- A reassessment of the in situ formation of close-in super-Earths
- Migration-driven diversity of super-Earth compositions
- Two Empirical Regimes of the Planetary Mass-Radius Relation
- Migration and gas accretion scenarios for the Kepler 16, 34 and 35 circumbinary planets
- Modelling Circumbinary Planets: The case of Kepler-38
- Discovery of a Third Transiting Planet in the Kepler-47 Circumbinary System
- On the evolution of mean motion resonances through stochastic forcing: Fast and slow libration modes and the origin of HD128311
- Stability Limits of Circumbinary Planets: Is There a Pile-up in the Kepler CBPs?
- A general model of resonance capture in planetary systems: First and second order resonances
- New developments for modern celestial mechanics. I. General coplanar three-body systems. Application to exoplanets
- Uncovering Circumbinary Planetary Architectural Properties from Selection Biases
- No circumbinary planets transiting the tightest Kepler binaries - a possible fingerprint of a third star
- The BEBOP radial-velocity survey for circumbinary planets I. Eight years of CORALIE observations of 47 single-line eclipsing binaries and abundance constraints on the masses of circumbinary planets
- 1I/`Oumuamua as a Tidal Disruption Fragment From a Binary Star System
- On the Fate of Unstable Circumbinary Planets: Tatooine's Close Encounters with a Death Star
- Planet Scattering Around Binaries: Ejections, Not Collisions
- Traditional formation scenarios fail to explain 4:3 mean motion resonances
- Formation of circumbinary planets in a dead zone
- An Analytic Criterion for Turbulent Disruption of Planetary Resonances
- Migration of planets in circumbinary discs
- Forming Circumbinary Planets: N-body Simulations of Kepler-34
- A machine learns to predict the stability of circumbinary planets
- 591 high velocity stars in the Galactic halo selected from LAMOST DR7 and Gaia DR2
- Ejection of rocky and icy material from binary star systems: Implications for the origin and composition of 1I/`Oumuamua
- Circumbinary planets II - when transits come and go
- The multiplicity distribution of Kepler's exoplanets
- Parking planets in circumbinary discs
- On the patterns observed in Kepler multi-planet systems
- Pushing planets into an inner cavity by a resonant chain
- Forming Diverse Super-Earth Systems in Situ
- Caustic Structures and Detectability of Circumbinary Planets in Microlensing
- Populations of planets in multiple star systems
- Hydrodynamical turbulence in eccentric circumbinary discs and its impact on the in situ formation of circumbinary planets
- Planet Packing in Circumbinary Systems
- Instabilities in Multi-Planet Circumbinary Systems
- Effects of Turbulence, Eccentricity Damping, and Migration Rate on the Capture of Planets into Mean Motion Resonance
- BEBOP III. Observations and an independent mass measurement of Kepler-16 (AB) b -- the first circumbinary planet detected with radial velocities
- In situ formation of hot Jupiters with companion super-Earths
- Circumbinary Planet Formation in the Kepler-16 System. II. A Toy Model for In-situ Planet Formation within a Debris Belt
- Placing Limits On The Transit Timing Variations Of Circumbinary Exoplanets
- Searching For Transiting Planets Around Halo Stars. II. Constraining the Occurrence Rate of Hot Jupiters
- Why is Interstellar Object 1I/2017 U1 (`Oumuamua) Rocky, Tumbling and Very Prolate?
- An Automated Method to Detect Transiting Circumbinary Planets
- Searching for Small Circumbinary Planets I. The STANLEY Automated Algorithm and No New Planets in Existing Systems
- Vertical settling of pebbles in turbulent circumbinary discs and the in situ formation of circumbinary planets
- The Kepler-223 resonance holds information on turbulence during the gas disk phase
- On the Orbital Spacing Pattern of Kepler Multiple Planet Systems
- Running The Gauntlet -- Survival of Small Circumbinary Planets Migrating Through Destabilising Resonances
- Terrestrial planet formation in a circumbinary disc around a coplanar binary
- The scattering outcomes of Kepler circumbinary planets: planet mass ratio
- 1:1 orbital resonance of circumbinary planets
- Searching For Transiting Planets Around Halo Stars. I. Sample Selection and Validation
- Modeling the microlensing of circumbinary systems
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- Radial-velocity discovery of a second planet in the TOI-1338/BEBOP-1 circumbinary system
- When, where, and how many planets end up in first-order resonances?
- Misaligned circumbinary disks as efficient progenitors of interstellar asteroids
- Circumbinary planets: migration, trapping in mean-motion resonances, and ejection
- DMPP-3: confirmation of short-period S-type planet(s) in a compact eccentric binary star system, and warnings about long-period RV planet detections
- Chasing Nomadic Worlds: A New Class of Deep Space Missions
- Stability of coorbital planets around binaries