White dwarf pollution by planets in stellar binaries

Abstract

Approximately $0.2\pm 0.2$ of white dwarfs (WDs) show signs of pollution by metals, which is likely due to the accretion of tidally disrupted planetary material. Models invoking planet-planet interactions after WD formation generally cannot explain pollution at cooling times of several Gyr. We consider a scenario in which a planet is perturbed by Lidov-Kozai oscillations induced by a binary companion and exacerbated by stellar mass loss, explaining pollution at long cooling times. Our computed accretion rates are consistent with observations assuming planetary masses between $\sim 0.01$ and $1M_{\mathrm{Mars}}$, although nongravitational effects may already be important for masses $\lesssim 0.3M_{\mathrm{Mars}}$. The fraction of polluted WDs in our simulations, $\sim 0.05$, is consistent with observations of WDs with intermediate cooling times between $\sim 0.1$ and 1 Gyr. For cooling times $\lesssim 0.1$ Gyr and $\gtrsim 1$ Gyr, our scenario cannot explain the high observed pollution fractions of up to 0.7. Nevertheless, our results motivate searches for companions around polluted WDs.

Accepted for publication in MNRAS Letters. 5 pages, 5 figures

References in corpus (36)

• Evolution of binary stars and the effect of tides on binary populations
• A Survey of Stellar Families: Multiplicity of Solar-Type Stars
• Shrinking binary and planetary orbits by Kozai cycles with tidal friction
• Long-Term Stability of Planets in Binary Systems
• A Tidally-Disrupted Asteroid Around the White Dwarf G29-38
• A disintegrating minor planet transiting a white dwarf
• Are There Unstable Planetary Systems Around White Dwarfs?
• Secular evolution of compact binaries near massive black holes: gravitational wave sources and other exotica
• The frequency of planetary debris around young white dwarfs
• The Equilibrium-Tide Model for Tidal Friction
• Infrared Signatures of Disrupted Minor Planets at White Dwarfs
• Supernova Type Ia progenitors from merging double white dwarfs: Using a new population synthesis model
• The Mass of KOI-94d and a Relation for Planet Radius, Mass, and Incident Flux
• The Orbital Evolution of Gas Giant Planets around Giant Stars
• The Link Between Planetary Systems, Dusty White Dwarfs, and Metal Polluted White Dwarfs
• Circumstellar Debris and Pollution at White Dwarf Stars
• Foretellings of Ragnarök: World-engulfing Asymptotic Giants and the Inheritance of White Dwarfs
• Pollution of single white dwarfs by accretion of many small asteroids
• Hot Jupiters and Cool Stars
• Dynamical effects of stellar mass loss on a Kuiper-like belt
• Black hole triple dynamics: breakdown of the orbit average approximation and implications for gravitational wave detections
• From binaries to multiples I: Data on F and G dwarfs within 67 pc of the Sun
• Consequences of the Ejection and Disruption of Giant Planets
• On the Spectral Evolution of Cool, Helium-Atmosphere White Dwarfs: Detailed Spectroscopic and Photometric Analysis of DZ Stars
• The Mass-Loss Induced Eccentric Kozai Mechanism: A New Channel for the Production of Close Compact Object-Stellar Binaries
• Planet Engulfment by ~1.5-3 Solar-Mass Red Giants
• The triple evolution dynamical instability: Stellar collisions in the field and the formation of exotic binaries
• The accretion-diffusion scenario for metals in cool white dwarfs
• Population synthesis of triple systems in the context of mergers of carbon-oxygen white dwarfs
• Secular dynamics of hierarchical multiple systems composed of nested binaries, with an arbitrary number of bodies and arbitrary hierarchical structure. First applications to multiplanet and multistar systems
• X-ray and Infrared Observations of Two Externally-Polluted White Dwarfs
• Full-lifetime simulations of multiple unequal-mass planets across all phases of stellar evolution
• A wide binary trigger for white dwarf pollution
• Star Hoppers: Planet Instability and Capture in Evolving Binary Systems
• Secular dynamics in hierarchical three-body systems with mass loss and mass transfer
• Q in Other Solar Systems

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• Cool DZ white dwarfs II: Compositions and evolution of old remnant planetary systems
• Polluted White Dwarfs: Constraints on the Origin and Geology of Exoplanetary Material
• Unstable low-mass planetary systems as drivers of white dwarf pollution
• The unbiased frequency of planetary signatures around single and binary white dwarfs using $Spitzer$ and $Hubble$
• Planetary engulfment as a trigger for white dwarf pollution
• Throwing Icebergs at White Dwarfs
• Explaining the variability of WD 1145+017 with simulations of asteroid tidal disruption
• Tidal disruption of planetary bodies by white dwarfs I: A hybrid SPH-analytical approach
• White Dwarf Pollution by Asteroids from Secular Resonances
• Tidal disruption of planetary bodies by white dwarfs II: Debris disc structure and ejected interstellar asteroids
• Multiple Stellar Evolution: a population synthesis algorithm to model the stellar, binary, and dynamical evolution of multiple-star systems
• Deposition of steeply infalling debris around white dwarf stars
• Giant Planets, Tiny Stars: Producing Short-Period Planets around White Dwarfs with the Eccentric Kozai-Lidov Mechanism
• Planetary Systems Around White Dwarfs
• Numerical Simulations of Gaseous Disks Generated from Collisional Cascades at the Roche Limits of White Dwarf Stars
• Enhanced Lidov-Kozai migration and the formation of the transiting giant planet WD1856+534b
• Formation and merging of Mass Gap Black Holes in Gravitational Wave Merger Events from Wide Hierarchical Quadruple Systems
• Eating Planets for Lunch and Dinner: Signatures of Planet Consumption by Evolving Stars
• Exoplanet recycling in massive white-dwarf debris discs
• Kozai Migration Naturally Explains the White Dwarf Planet WD1856b
• Bayesian constraints on the origin and geology of exo-planetary material using a population of externally polluted white dwarfs
• Double neutron star mergers from hierarchical triple-star systems
• Circularization of tidal debris around white dwarfs: implications for gas production and dust variability
• The fates of Solar system analogues with one additional distant planet
• The lifetimes of planetary debris discs around white dwarfs
• Post-main-sequence debris from rotation-induced YORP break-up of small bodies II: multiple fissions, internal strengths and binary production
• Tidal circularization of gaseous planets orbiting white dwarfs
• Return of the TEDI: revisiting the Triple Evolution Dynamical Instability channel in triple stars
• A statistical view on stable and unstable Roche lobe overflow of a tertiary star onto the inner binary in triple systems
• Embedding planetesimals into white dwarf discs from large distances
• Binary star influence on post-main-sequence multi-planet stability
• Orbital relaxation and excitation of planets tidally interacting with white dwarfs
• Properties of von Zeipel-Lidov-Kozai oscillations in triple systems at the quadrupole order: relaxing the test particle approximation
• Post main sequence evolution of icy minor planets II: water retention and white dwarf pollution around massive progenitor stars
• UV Surface Environments and Atmospheres of Earth-like Planets Orbiting White Dwarfs
• The dynamical history of the evaporating or disrupted ice giant planet around white dwarf WD J0914+1914
• Effects of non-Kozai mutual inclinations on two-planet system stability through all phases of stellar evolution
• Circumbinary exoplanets and brown dwarfs with the Laser Interferometer Space Antenna
• Post-main-sequence evolution of icy minor planets. III. water retention in dwarf planets and exo-moons and implications for white dwarf pollution
• Secular chaos in white-dwarf planetary systems: origins of metal pollution and short-period planetary companions
• Chaotic rotation and evolution of asteroids and small planets in high-eccentricity orbits around white dwarfs
• On the role of resonances in polluting white dwarfs by asteroids
• Survivability of radio-loud planetary cores orbiting white dwarfs
• Near-infrared variability in dusty white dwarfs: tracing the accretion of planetary material
• High-resolution Spectra and Biosignatures of Earth-like Planets Transiting White Dwarfs
• Linking the formation and fate of exo-Kuiper belts within solar system analogues
• The entry geometry and velocity of planetary debris into the Roche sphere of a white dwarf
• The critical binary star separation for a planetary system origin of white dwarf pollution
• The unstable fate of the planet orbiting the A-star in the HD 131399 triple stellar system
• The post-main-sequence fate of the HR 8799 planetary system
• Generating metal-polluting debris in white dwarf planetary systems from small-impact crater ejecta
• Astrophysics with the Laser Interferometer Space Antenna
• Short-term stability of particles in the WD J0914+1914 white dwarf planetary system
• High-resolution resonant portraits of a single-planet white dwarf system
• Future Exoplanet Research: Science Questions and How to Address Them
• Partial disruption of a planet around a white dwarf: the effect of perturbation from the remnant planet on the accretion
• Binary asteroid dissociation and accretion around white dwarfs
• PHL 5038AB: Is the brown dwarf causing pollution of its white dwarf host star?
• The hierarchical three-body problem at $\mathcal{O}(G^2)$