Second-generation dust in planetary systems: The case of HD 163296

Abstract

Observations indicate that large, dust-laden protoplanetary discs are common. Some features, like gaps, rings and spirals, suggest they may host young planets, which can excite the orbits of nearby leftover planetesimals. Energetic collisions among these bodies can lead to the production of second-generation dust. Grains produced by collisions may have a dynamical behaviour different from that of first-generation, primordial dust out of which planetesimals and planets formed. We aim to study these differences for the HD 163296 system and determine whether dynamical signatures in the mixture of the two dust populations can help separate their contributions. We use three-dimensional (3-D) hydrodynamic models to describe the gaseous disc with three, Saturn- to Jupiter-mass, embedded planets. Dust grains, of sizes 1um-1mm, are treated as Lagrangean particles with resolved thermodynamics and mass loss. Initial disc and planet configurations are derived from observation-based work, which indicates low gas viscosity. The 3-D approach also allows us to detect the formation of vortices induced by Rossby waves, where dust becomes concentrated and may contribute to planetesimal formation. We find that the main differences in the dynamical behaviour of first- and second-generation dust occur in the vertical distribution. The two populations have similar distributions around the disc mid-plane, although second-generation dust shows longer residence times close to the radial locations of the planets' gas gaps. Sedimentation rates of um-size grains are comparable to or lower than the production rates by planetesimals' collisions, making this population potentially observable. These outcomes can be extended to similar systems harbouring giant planets.

arXiv comment13 pages, 1 table, 13 figures. Accepted for publication in Monthly Notices of the Royal Astronomical Society Main Journal

References in corpus (38)

• Evolutionary models for cool brown dwarfs and extrasolar giant planets. The case of HD 20945
• Rossby Wave Instability of Keplerian Accretion Disks
• FARGO: a fast eulerian transport algorithm for differentially rotating disks
• The effect of dust settling on the appearance of protoplanetary disks
• A Kinematical Detection of Two Embedded Jupiter Mass Planets in HD 163296
• Kinematic evidence for an embedded protoplanet in a circumstellar disc
• Weak Turbulence in the HD 163296 Protoplanetary Disk Revealed by ALMA CO Observations
• Models of Jupiter's Growth Incorporating Thermal and Hydrodynamic Constraints
• Rossby Wave Instability of Thin Accretion Disks - III. Nonlinear Simulations
• Gaia DR2 study of Herbig Ae/Be stars
• Two-Component Secular Gravitational Instability in a Protoplanetary Disk: A Possible Mechanism for Creating Ring-Like Structures
• Towards Initial Mass Functions for Asteroids and Kuiper Belt Objects
• Particle Aggregation in a turbulent Keplerian flow
• Evolution of Giant Planets in Eccentric Disks
• Saturation of the corotation resonance in a gaseous disk
• The formation of Jupiter by hybrid pebble-planetesimal accretion
• Outward Migration of Jupiter and Saturn in Evolved Gaseous Disks
• The HD 163296 Circumstellar Disk in Scattered Light: Evidence of Time-Variable Self-Shadowing
• Estimate on dust scale height from ALMA dust continuum image of the HD 163296 protoplanetary disk
• Dust modeling of the combined ALMA and SPHERE datasets of HD163296. Is HD163296 really a Meeus group II disk?
• Capture and Evolution of Planetesimals in Circumjovian Disks
• New constraints on turbulence and embedded planet mass in the HD 163296 disk from planet-disk hydrodynamic simulations
• Long Term Evolution of Planet-Induced Vortices in Protoplanetary Disks
• Rossby Wave Instability in three dimensional discs
• Midplane temperature and outer edge of the protoplanetary disk around HD 163296
• Rings and gaps in protoplanetary disks: planets or snowlines?
• Radial variations in grain sizes and dust scale heights in the protoplanetary disk around HD 163296 revealed by ALMA polarization observation
• The impact of pebble flux regulated planetesimal formation on giant planet formation
• High-Contrast study of the candidate planets and protoplanetary disk around HD~100546
• Interpreting high spatial resolution line observations of planet-forming disks with gaps and rings -- The case of HD 163296
• Multi-epoch Direct Imaging and Time-Variable Scattered Light Morphology of the HD 163296 Protoplanetary Disk
• Vortices as nurseries for planetesimal formation in protoplanetary discs
• On Rossby waves and vortices with differential rotation
• Growth of Jupiter: Formation in Disks of Gas and Solids and Evolution to the Present Epoch
• Dust-to-gas ratio resurgence in circumstellar disks due to the formation of giant planets: the case of HD 163296
• Determining mass limits around HD163296 through SPHERE direct imaging data
• Disk Illumination and Jet Variability of the Herbig Ae Star HD 163296 Using Multi-Epoch HST/STIS Optical, Near-IR, and Radio Imagery and Spectroscopy
• Circumstellar dust distribution in systems with two planets in resonance

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