Are WASP-107-like Systems Consistent with High-eccentricity Migration?

Abstract

WASP-107 b seems to be a poster child of the long-suspected high-eccentricity migration scenario. It is on a 5.7-day, polar orbit. The planet is Jupiter-like in radius but Neptune-like in mass with exceptionally low density. WASP-107 c is on a 1100-day, $e=0.28$ orbit with at least Saturn mass. Planet b may still have a residual eccentricity of $0.06\pm 0.04$: the ongoing tidal dissipation leads to the observed internally heated atmosphere and hydrodynamic atmospheric erosion. We present a population synthesis study coupling octopole Lidov-Kozai oscillations with various short-range forces, while simultaneously accounting for the radius inflation and tidal disruption of the planet. We find that a high-eccentricity migration scenario can successfully explain nearly all observed system properties. Our simulations further suggest that the initial location of WASP-107 b at the onset of migration is likely within the snowline ($<0.5\mathrm{AU}$). More distant initial orbits usually lead to tidal disruption or orbit crossing. WASP-107 b most likely lost no more than 20% of its mass during the high-eccentricity migration, i.e. it did not form as a Jupiter-mass object. More vigorous tidally-induced mass loss leads to disruption of the planet during migration. We predict that the current-day mutual inclination between the planets b and c is substantial: at least 25-55${}^{\circ }$ which may be tested with future Gaia astrometric observations. Knowing the current-day mutual inclination may further constrain the initial orbit of planet b. We suggest that the proposed high-eccentricity migration scenario of WASP-107 may be applicable to HAT-P-11, GJ-3470, HAT-P-18, and GJ-436 which have similar orbital architectures.

arXiv comment19 pages, 10 figures. Accepted by ApJ

References in corpus (79)

• The Gaia mission
• The James Webb Space Telescope
• Shrinking binary and planetary orbits by Kozai cycles with tidal friction
• The effects of snowlines on C/O in planetary atmospheres
• Dynamical Outcomes of Planet-Planet Scattering
• The Eccentric Kozai-Lidov Effect and Its Applications
• Obliquities of Hot Jupiter host stars: Evidence for tidal interactions and primordial misalignments
• Probabilistic Forecasting of the Masses and Radii of Other Worlds
• Origins of Hot Jupiters
• Hot Jupiters from Secular Planet--Planet Interactions
• A giant comet-like cloud of hydrogen escaping the warm Neptune-mass exoplanet GJ 436b
• Planet formation around stars of various masses: The snow line and the frequency of giant planets
• Towards a deterministic model of planetary formation. III. Mass distribution of short-period planets around stars of various masses
• A Neptune-Mass Planet Orbiting the Nearby M Dwarf GJ 436
• Origins of Eccentric Extrasolar Planets: Testing the Planet-Planet Scattering Model
• HAT-P-11b: A Super-Neptune Planet Transiting a Bright K Star in the Kepler Field
• Secular Dynamics in Hierarchical Three-Body Systems
• Helium in the eroding atmosphere of an exoplanet
• On the Formation of Hot Jupiters in Stellar Binaries
• Photochemically-produced SO${}_2$ in the atmosphere of WASP-39b
• On the tidal evolution of Hot Jupiters on inclined orbits
• Starspots, spin-orbit misalignment, and active latitudes in the HAT-P-11 exoplanetary system
• Spectrally resolved helium absorption from the extended atmosphere of a warm Neptune-mass exoplanet
• To Cool is to Accrete: Analytic Scalings for Nebular Accretion of Planetary Atmospheres
• Mass-Metallicity Trends in Transiting Exoplanets from Atmospheric Abundances of H${}_2$O, Na, and K
• Suppression of extreme orbital evolution in triple systems with short range forces
• Eccentricity growth and orbit flip in coplanar hierarchical three body systems
• Consequences of the Ejection and Disruption of Giant Planets
• Merging Binaries in the Galactic Center: The eccentric Kozai-Lidov mechanism with stellar evolution
• Steady-state planet migration by the Kozai-Lidov mechanism in stellar binaries
• Formation and Stellar Spin-Orbit Misalignment of Hot Jupiters from Lidov-Kozai Oscillations in Stellar Binaries
• Orbital misalignment of the Neptune-mass exoplanet GJ 436b with the spin of its cool star
• Black Hole and Neutron Star Binary Mergers in Triple Systems: Merger Fraction and Spin-Orbit Misalignment
• Warm Jupiters from secular planet-planet interactions
• A Temporary Epoch of Stalled Spin-Down for Low-Mass Stars: Insights from NGC 6811 with Gaia and Kepler
• A hot Uranus transiting the nearby M dwarf GJ3470. Detected with HARPS velocimetry. Captured in transit with TRAPPIST photometry
• Chaos in the Test Particle Eccentric Kozai-Lidov Mechanism
• High-resolution confirmation of an extended helium atmosphere around WASP-107b
• SO2, silicate clouds, but no CH4 detected in a warm Neptune
• Origin of Tidal Dissipation in Jupiter: II. the Value of Q
• The discoveries of WASP-91b, WASP-105b and WASP-107b: two warm Jupiters and a planet in the transition region between ice giants and gas giants
• A High Internal Heat Flux and Large Core in a Warm Neptune Exoplanet
• Interacting Binaries with Eccentric Orbits. Secular Orbital Evolution Due To Conservative Mass Transfer
• On the tidal interaction of massive extra-solar planets on highly eccentric orbit
• Water, High-Altitude Condensates, and Possible Methane Depletion in the Atmosphere of the Warm Super-Neptune WASP-107b
• HAT-P-18b and HAT-P-19b: Two Low-Density Saturn-Mass Planets Transiting Metal-Rich K Stars
• WASP-107b's density is even lower: a case study for the physics of planetary gas envelope accretion and orbital migration
• A warm Neptune's methane reveals core mass and vigorous atmospheric mixing
• Confirmation of WASP-107b's extended Helium atmosphere with Keck II/NIRSPEC
• Dynamical Tides in Rotating Binary Stars
• The Warm Neptune GJ 3470b has a Polar Orbit
• Chaotic Tides in Migrating Gas Giants: Forming Hot and Transient Warm Jupiters via High-Eccentricity Migration
• Tidally-Induced Radius Inflation of Sub-Neptunes
• Evidence for a high mutual inclination between the cold Jupiter and transiting super Earth orbiting $\pi$ Men
• Dynamic tides in rotating objects: orbital circularisation of extra solar planets for realistic planet models
• Throwing Icebergs at White Dwarfs
• The Empirical Limits of Gyrochronology
• Breaking Degeneracies in Formation Histories by Measuring Refractory Content in Gas Giants
• A disk-driven resonance as the origin of high inclinations of close-in planets
• Dusty outflows in planetary atmospheres: Understanding "super-puffs" and transmission spectra of sub-Neptunes
• The GAPS Programme with HARPS-N at TNG. III: The retrograde orbit of HAT-P-18b
• The Oblique Orbit of WASP-107b from K2 Photometry
• Diffusive Tidal Evolution for Migrating hot Jupiters
• A-type Stars, the Destroyers of Worlds: The lives and deaths of Jupiters in evolving stellar binaries
• The TESS-Keck Survey IV: A Retrograde, Polar Orbit for the Ultra-Low-Density, Hot Super-Neptune WASP-107b
• The post-transit tail of WASP-107b observed at 10830A
• Modelling the He I triplet absorption at 10830 Angstroms in the atmospheres of HD 189733 b and GJ 3470 b
• Dynamical Tides in Highly Eccentric Binaries: Chaos, Dissipation and Quasi-Steady State
• Metastable Helium Reveals an Extended Atmosphere for the Gas Giant HAT-P-18b
• Slow Cooling and Fast Reinflation for Hot Jupiters
• Metastable Helium Absorptions with 3D Hydrodynamics and Self-Consistent Photochemistry II: WASP-107b, Stellar Wind, Radiation Pressure, and Shear Instability
• Dynamics of Planetary Systems Within Star Clusters: Aspects of the Solar System's Early Evolution
• Spin and Eccentricity Evolution in Triple Systems: from the Lidov-Kozai Interaction to the Final Merger of the Inner Binary
• High-Eccentricity Migration with Disk-Induced Spin-Orbit Misalignment: a Preference for Perpendicular Hot Jupiters
• Dynamics of Stellar Spin Driven by Planets Undergoing Lidov-Kozai Migration: Paths to Spin-Orbit Misalignment
• Elemental Abundances of the Super-Neptune WASP-107b's Host Star Using High-resolution, Near-infrared Spectroscopy
• Kepler-1656b's Extreme Eccentricity: Signature of a Gentle Giant
• Tidal evolution and diffusive growth during high-eccentricity planet migration: revisiting the eccentricity distribution of hot Jupiters
• Tides in the high-eccentricity migration of hot Jupiters: Triggering diffusive growth by nonlinear mode interactions

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• A third star in the HAT-P-7 system, and a new dynamical pathway to misaligned hot Jupiters
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• Gravitational Radiation-Driven Chaotic Tide in a White Dwarf-Massive Black Hole Binary as a Source of Repeating X-ray Transients
• Evidence for a Nonzero Eccentricity Superpuff Exoplanet WASP-107 b Using JWST Occultation Observation
• Reliability of 1D radiative-convective photochemical-equilibrium retrievals on transit spectra of WASP-107b
• POSEIDON II: The Anti-Aligned Orbit of the Warm Neptune TOI-1710 A b