On the origin of the wide-orbit circumbinary giant planet HD 106906: A dynamical scenario and its impact on the disk

Abstract

A giant planet has been recently resolved at a projected distance of 730 au from the tight pair of young ($\sim$ 13 Myr) intermediate-mass stars HD 106906AB in the Lower Centaurus Crux (LCC) group. The stars are surrounded by a debris disk which displays a ring-like morphology and strong asymmetries at multiple scales. We aim at studying the likelihood of a scenario where the planet formed closer to the stars in the disk, underwent inward disk-induced migration, and got scattered away by the binary star before being stabilized by a close encounter (fly-by). We performed semi-analytical calculations and numerical simulations (Swift_HJS package) to model the interactions between the planet and the two stars. We accounted for the migration as a simple force. We studied the LCC kinematics to set constraints on the local density of stars, and therefore on the fly-by likelihood. We performed N-body simulations to determine the effects of the planet trajectories (ejection and secular effects) onto the disk morphology. The combination of the migration and mean-motion resonances with the binary star (often 1:6) can eject the planet. Nonetheless, we estimate that the fly-by hypothesis decreases the scenario probability to less than $10^{-7}$ for a derived local density of stars of 0.11 stars/pc${}^3$. We show that the concomitant effect of the planet and stars trajectories induce spiral-features in the disk which may correspond to the observed asymmetries. Moreover, the present disk shape suggests that the planet is on an eccentric orbit. The scenario we explored is a natural hypothesis if the planet formed within a disk. Conversely, its low probability of occurrence and the fact that HD 106906 b shares some characteristics with other systems in Sco-Cen (e.g. HIP 78530, in terms of mass ratio and separation) may indicate an alternative formation pathway for those objects.

arXiv comment16 pages, 14 figures, 4 tables. Accepted for publication in A&A

References in corpus (47)

• Validation of the new Hipparcos reduction
• The SIMBAD astronomical database
• Disk Frequencies and Lifetimes in Young Clusters
• Evolutionary models for cool brown dwarfs and extrasolar giant planets. The case of HD 20945
• A Hipparcos census of the nearby OB associations
• The PPMXL catalog of positions and proper motions on the ICRS. Combining USNO-B1.0 and 2MASS
• The Mass Dependence Between Protoplanetary Disks and their Stellar Hosts
• Gaia Data Release 1: Astrometry - one billion positions, two million proper motions and parallaxes
• A Revised Age for Upper Scorpius and The Star-Formation History Among the F-Type Members of the Scorpius-Centaurus OB Association
• Estimating distances from parallaxes
• Planet formation around stars of various masses: The snow line and the frequency of giant planets
• Dust and Gas in the disc of HL Tauri: Surface density, dust settling, and dust-to-gas ratio
• The Star-formation History and Accretion-Disk Fraction Among the K-Type Members of the Scorpius-Centaurus OB Association
• The RAdial Velocity Experiment (RAVE): Fourth data release
• The Geneva-Copenhagen Survey of the Solar neighbourhood II. New uvby calibrations and rediscussion of stellar ages, the G dwarf problem, age-metallicity diagram, and heating mechanisms of the disk
• Pulkovo Compilation of Radial Velocities for 35495 Hipparcos Stars in a Common System
• Protoplanetary disk lifetimes vs stellar mass and possible implications for giant planet populations
• The effects of fly-bys on planetary systems
• Migration of massive planets in accreting disks
• On disc driven inward migration of resonantly coupled planets with application to the system around GJ876
• HD 106906 b: A planetary-mass companion outside a massive debris disk
• The Southern Proper Motion Program IV. The SPM4 Catalog
• Astrometric radial velocities III. Hipparcos measurements of nearby star clusters and associations
• Debris Disks in the Scorpius-Centaurus OB Association Resolved by ALMA
• New Members of the Scorpius Centaurus Complex and Ages of its sub-regions
• The effects of dynamical interactions on planets in young substructured star clusters
• Spiral Structure when Setting up Pericentre Glow: Possible Giant Planets at Hundreds of AU in the HD141569 Disk
• Explicit expansion of the three-body disturbing function for arbitrary eccentricities and inclinations
• The VLT/NaCo Large program to probe the occurrence of exoplanets and brown dwarfs in wide orbits: I- Sample definition and characterization
• A narrow, edge-on disk resolved around HD 106906 with SPHERE
• Possible Commensurabilities Among Pairs of Extrasolar Planets
• A Primer on Unifying Debris Disk Morphologies
• Sizes of protoplanetary discs after star-disc encounters
• Discovery of a ~23 Mjup Brown Dwarf Orbiting ~700 AU from the Massive Star HIP 78530 in Upper Scorpius
• Structuring the HD 141569 A circumstellar dust disk. Impact of eccentric bound stellar companions
• ALMA reveals the anatomy of the mm-sized dust and molecular gas in the HD 97048 disk
• A Pan-STARRS + UKIDSS Search for Young, Wide Planetary-Mass Companions in Upper Scorpius
• Searching for Scatterers: High-Contrast Imaging of Young Stars Hosting Wide-Separation Planetary-Mass Companions
• Mass transfer between debris discs during close stellar encounters
• On the origin of the wide-orbit circumbinary giant planet HD 106906: A dynamical scenario and its impact on the disk
• Orbital clustering of distant Kuiper Belt Objects by hypothetical Planet 9. Secular or resonant ?
• HD 106906: A Case Study for External Perturbations of a Debris Disk
• A revised moving cluster distance to the Pleiades open cluster
• A debris disk under the influence of a wide planetary mass companion: The system of HD106906
• A new method for calculating the convergent point of a moving group
• Orbital Circularization of a Planet Accreting Disk Gas: Formation of Distant Jupiters in Circular Orbits based on Core Accretion Model
• Magellan AO System $z^{\prime }$, $Y_S$, and $L^{\prime }$ Observations of the Very Wide 650 AU HD 106906 Planetary System

Cited by in corpus (28)

• Orbital dynamics of circumbinary planets
• On the origin of the wide-orbit circumbinary giant planet HD 106906: A dynamical scenario and its impact on the disk
• A HARPS RV search for planets around young nearby stars
• First detection of orbital motion for HD 106906 b: A wide-separation exoplanet on a Planet Nine-like orbit
• A Near-coplanar Stellar Flyby of the Planet Host Star HD 106906
• Dynamical models to explain observations with SPHERE in planetary systems with double debris belts
• JWST-TST High Contrast: Living on the Wedge, or, NIRCam Bar Coronagraphy Reveals CO${}_2$ in the HR 8799 and 51 Eri Exoplanets' Atmospheres
• Encounters involving planetary systems in birth environments: the significant role of binaries
• Cloud Atlas: High-precision HST/WFC3/IR Time-Resolved Observations of Directly-Imaged Exoplanet HD106906b
• Observing the gas component of circumplanetary disks around wide-orbit planet-mass companions in the (sub)mm regime
• Giant Impacts and Debris Disk Morphology
• The case of HD 106906 debris disc: A binary's revenge
• A Deep Polarimetric Study of the Asymmetrical Debris Disk HD 106906
• High signal-to-noise spectral characterization of the planetary-mass object HD 106906 b
• The vertical structure of debris discs and the role of disc gravity: A primer using a simplified model
• Formation History of HD106906 and the Vertical Warping of Debris Disks by an External Inclined Companion
• The ALMA survey to Resolve exoKuiper belt Substructures (ARKS): VI. Asymmetries and offsets
• ALMA imaging of the M-dwarf Fomalhaut C's debris disc
• ODEA: Orbital Dynamics in a complex Evolving Architecture -- Application to the planetary system HD 106906
• Characterization of debris disks observed with SPHERE
• Millimeter Dust Emission and Planetary Dynamics in the HD 106906 System
• Simulations of the dynamics of the debris disks in the systems Kepler-16, Kepler-34, and Kepler-35
• Search for Stellar Flybys in the Sco-Cen OB Association with the Gaia DR2
• WIde Separation Planets In Time (WISPIT): Two directly imaged exoplanets around the Sun-like stellar binary WISPIT 1
• HD 143811 AB b: A Directly Imaged Planet Orbiting a Spectroscopic Binary in Sco-Cen
• Radial velocity analysis of stars with debris discs
• Discovery of carbon monoxide emission from five debris disks around young A-type stars
• Winding Motion of Spirals in a Gravitationally Unstable Protoplanetary Disk