Binary star influence on post-main-sequence multi-planet stability

Abstract

Nearly every star known to host planets will become a white dwarf, and nearly 100 planet-hosts are now known to be accompanied by binary stellar companions. Here, we determine how a binary companion triggers instability in otherwise unconditionally stable single-star two-planet systems during the giant branch and white dwarf phases of the planet host. We perform about 700 full-lifetime (14 Gyr) simulations with A0 and F0 primary stars and secondary K2 companions, and identify the critical binary distance within which instability is triggered at any point during stellar evolution. We estimate this distance to be about seven times the outer planet separation, for circular binaries. Our results help characterize the fates of planetary systems, and in particular which ones might yield architectures that are conducive to generating observable heavy metal pollution in white dwarf atmospheres.

Accepted for publication in MNRAS

References in corpus (29)

• The frequency of planetary debris around young white dwarfs
• A gaseous metal disk around a white dwarf
• Foretellings of Ragnarök: World-engulfing Asymptotic Giants and the Inheritance of White Dwarfs
• Hot Jupiters and Cool Stars
• Formation of planetary debris discs around white dwarfs I: Tidal disruption of an extremely eccentric asteroid
• Stability Limits in Extra-solar Planetary Systems
• Planet Engulfment by ~1.5-3 Solar-Mass Red Giants
• On the Abundance of Circumbinary Planets
• Detectable close-in planets around white dwarfs through late unpacking
• Signs of a faint disc population at polluted white dwarfs
• Variable Emission from a Gaseous Disc around a Metal-Polluted White Dwarf
• Planetary engulfment as a trigger for white dwarf pollution
• White dwarf pollution by planets in stellar binaries
• The Occurrence of Wide-Orbit Planets in Binary Star Systems
• The trigger of the AGB superwind: the importance of carbon
• WD 1145+017 Photometric Observations During 8 Months of High Activity
• Dynamical behaviour of multiplanet systems close to their stability limit
• Analytic orbit propagation for transiting circumbinary planets
• Stability criteria for hierarchical triple systems
• The Fate of Exomoons in White Dwarf Planetary Systems
• The fates of Solar system analogues with one additional distant planet
• Linking long-term planetary $N$-body simulations with periodic orbits: application to white dwarf pollution
• Eccentricity evolution in hierarchical triple systems with eccentric outer binaries
• Mass and eccentricity constraints on the planetary debris orbiting the white dwarf WD 1145+017
• Secular dynamics of planetesimals in tight binary systems: Application to Gamma-Cephei
• Eccentricity generation in hierarchical triple systems with coplanar and initially circular orbits
• Improved equations for eccentricity generation in hierarchical triple systems
• Eccentricity generation in hierarchical triple systems: the planetary regime
• Relating binary-star planetary systems to central configurations

Cited by in corpus (6)

• Explaining the variability of WD 1145+017 with simulations of asteroid tidal disruption
• A 3 Gyr White Dwarf with Warm Dust Discovered via the Backyard Worlds: Planet 9 Citizen Science Project
• The dynamical history of the evaporating or disrupted ice giant planet around white dwarf WD J0914+1914
• Is there a circumbinary planet around NSVS 14256825?
• Survivability of radio-loud planetary cores orbiting white dwarfs
• The critical binary star separation for a planetary system origin of white dwarf pollution