Multi-planet disc interactions in binary systems

Abstract

We investigate the evolution of a multi--planet--disc system orbiting one component of a binary star system. The planet--disc system is initially coplanar but misaligned to the binary orbital plane. The planets are assumed to be giants that open gaps in the disc. We first study the role of the disc in shaping the mutual evolution of the two planets using a secular model for low initial tilt. In general we find that the planets and the disc do not remain coplanar, in agreement with Lubow & Martin (2016) for the single planet case. Instead, the planets and the disc undergo tilt oscillations. A high mass disc between the two planets causes the planets and the disc to nodally precess at the same average rate but they are generally misaligned. The amplitude of the tilt oscillations between the planets is larger while the disc is present. We then consider higher initial tilts using hydrodynamical simulations and explore the possibility of the formation of eccentric Kozai-Lidov (KL) planets. We find that the inner planet's orbit undergoes eccentricity growth for a large range of disc masses and initial misalignments. For a low disc mass and large initial misalignment both planets and the disc can undergo KL oscillations. Furthermore, we find that sufficiently massive discs can cause the inner planet to increase its inclination beyond $90^{\circ }$ and therefore to orbit the binary in a retrograde fashion. The results have important implications for the explanation of very eccentric planets and retrograde planets observed in multi-planet systems.

Accepted for publication in MNRAS

References in corpus (37)

• Disk Frequencies and Lifetimes in Young Clusters
• Modelling Accretion in Protobinary Systems
• The Occurrence and Architecture of Exoplanetary Systems
• SPLASH: An interactive visualisation tool for Smoothed Particle Hydrodynamics simulations
• Hot Stars with Hot Jupiters Have High Obliquities
• Smoothed Particle Hydrodynamics and Magnetohydrodynamics
• Spin-orbit angle measurements for six southern transiting planets; New insights into the dynamical origins of hot Jupiters
• Timescale of Mass Accretion in Pre-Main-Sequence Stars
• Stellar Spin-Orbit Misalignment in a Multiplanet System
• Three-dimensional Calculations of High and Low-mass Planets Embedded in Protoplanetary Discs
• On the Location of the Snow Line in a Protoplanetary Disk
• WASP-17b: an ultra-low density planet in a probable retrograde orbit
• Evolution of Spin Direction of Accreting Magnetic Protostars and Spin-Orbit Misalignment in Exoplanetary Systems
• Tearing up the disc: misaligned accretion on to a binary
• Nested-grid calculations of disk-planet interaction
• On the diffusive propagation of warps in thin accretion discs
• On the convergence of the critical cooling timescale for the fragmentation of self-gravitating discs
• The Kozai-Lidov Mechanism in Hydrodynamical Disks
• Formation and Evolution of Planetary Systems: Upper Limits to the Gas Mass in Disks Around Sun-like Stars
• Non-convergence of the critical cooling timescale for fragmentation of self-gravitating discs
• Warp diffusion in accretion discs: a numerical investigation
• Most Sub-Arcsecond Companions of Kepler Exoplanet Candidate Host Stars are Gravitationally Bound
• A comparison between grid and particle methods on the statistics of driven, supersonic, isothermal turbulence
• Models of Accreting Gas Giant Protoplanets in Protostellar Disks
• The Rossiter-McLaughlin effect in Exoplanet Research
• Planetary Systems in Binaries. I. Dynamical Classification
• Stable counteralignment of a circumbinary disc
• Planet-disc evolution and the formation of Kozai-Lidov planets
• Secular interactions between inclined planets and a gaseous disk
• The Kozai-Lidov Mechanism in Hydrodynamical Disks. II. Effects of binary and disk parameters
• Robo-AO Kepler Survey IV: the effect of nearby stars on 3857 planetary candidate systems
• The Kozai-Lidov Mechanism in Hydrodynamical Disks. III. Effects of Disk Mass and Self-Gravity
• A Pan-STARRS1 study of the relationship between wide binarity and planet occurrence in the Kepler field
• The Evolution of Planet-Disk Systems That Are Mildly Inclined to the Orbit of a Binary Companion
• Misaligned accretion disc formation via Kozai-Lidov oscillations
• Kozai-Lidov Disc Instability
• Decoupling of a giant planet from its disk in an inclined binary system

Cited by in corpus (10)

• Stellar obliquities in exoplanetary systems
• Orbital Architectures of Planet-Hosting Binaries II. Low Mutual Inclinations Between Planetary and Stellar Orbits
• Polar planets around highly eccentric binaries are the most stable
• Spirals, shadows & precession in HD 100453 -- II. The hidden companion
• The Young Planet DS Tuc Ab has a Low Obliquity
• Formation of polar circumstellar discs in binary star systems
• Evolution of $\alpha$ Centauri B's protoplanetary disc
• 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
• Kozai-Lidov oscillations triggered by a tilt instability of detached circumplanetary discs
• Dynamical Architectures of S-type Transiting Planets in Binaries II: A Dichotomy in Orbital Alignment of Small Planets in Close Binary Systems