Effects of Ringed Structures and Dust Size Growth on Millimeter Observations of Protoplanetary Disks

Abstract

The growth of solids from sub-micron to millimeter and centimeter sizes is the early step toward the formation of planets inside protoplanetary disks (PPDs). However, such processes and their potential impact on the later stages of solid growth are still poorly understood. In this work, we test the hypothesis that most disks contain at least one ringed structure with a relative small radius. We have carried out a large family of 1D two-fluid (gas+dust) hydrodynamical simulations by evolving the gas and dust motion self-consistently while allowing dust size to evolve via coagulation and fragmentation. We investigate the joint effects of ringed structures and dust size growth on the overall sub-millimeter and millimeter (mm) flux and spectral index of PPDs. Ringed structures slow down the dust radial drift and speed up the dust growth. In particular, we find that those unresolved disks with a high fragmentation velocity ($\sim 10\mathrm{m}{\mathrm{s}}^{-1}$) and a high dust surface density ($\sim 10\mathrm{g}\mathrm{c}{\mathrm{m}}^{-2}$ in the ring) can have mm spectral indices as low as $\sim 2.0$, consistent with mm observations of faint disks in nearby star forming regions. Furthermore, disks with more than one ringed structure can potentially reproduce brighter disks with spectral indices lower than $\sim 2.5$. Future multi-wavelength high-resolution observations of these low spectral index sources can be used to test the existence of the ringed structures in the unresolved disks and differentiate the effects of dust size growth from optical depth.

arXiv comment18 pages, accepted for publication in ApJ

References in corpus (78)

• Astropy: A Community Python Package for Astronomy
• The NumPy array: a structure for efficient numerical computation
• Streaming Instabilities in Protoplanetary Disks
• First Results from High Angular Resolution ALMA Observations Toward the HL Tau Region
• The Disk Substructures at High Angular Resolution Project (DSHARP): I. Motivation, Sample, Calibration, and Overview
• A simple model for the evolution of the dust population in protoplanetary disks
• Coagulation, fragmentation and radial motion of solid particles in protoplanetary disks
• Gas- and dust evolution in protoplanetary disks
• Particle Stirring in Turbulent Gas Disks: Including Orbital Oscillations
• Rossby Wave Instability of Keplerian Accretion Disks
• Ringed Substructure and a Gap at 1 AU in the Nearest Protoplanetary Disk
• Rosseland and Planck Mean Opacities for Protoplanetary Discs
• Gaps and Rings in an ALMA Survey of Disks in the Taurus Star-forming Region
• Dynamics of Protoplanetary Disks
• On the Submillimeter Opacity of Protoplanetary Disks
• The Disk Substructures at High Angular Resolution Project (DSHARP): II. Characteristics of Annular Substructures
• Protoplanetary Disk Turbulence Driven by the Streaming Instability: Non-Linear Saturation and Particle Concentration
• Radial Flow of Dust Particles in Accretion Disks
• Turbulence in Accretion Disks. Vorticity Generation and Angular Momentum Transport via the Global Baroclinic Instability
• Dust and Gas in the disc of HL Tauri: Surface density, dust settling, and dust-to-gas ratio
• Forming Planetesimals in Solar and Extrasolar Nebulae
• Protoplanetary Disk Structures in Ophiuchus II: Extension to Fainter Sources
• Dust Properties of Protoplanetary Disks in the Taurus-Auriga Star Forming Region from Millimeter Wavelengths
• The Disk Substructures at High Angular Resolution Project (DSHARP): VII. The Planet-Disk Interactions Interpretation
• Zonal Flows and Long-Lived Axisymmetric Pressure Bumps in Magnetorotational Turbulence
• The Disk Substructures at High Angular Resolution Project (DSHARP) VI: Dust trapping in thin-ringed protoplanetary disks
• Trapping dust particles in the outer regions of protoplanetary disks
• The Disk Substructures at High Angular Resolution Project (DSHARP): V. Interpreting ALMA maps of protoplanetary disks in terms of a dust model
• ALMA Survey of Lupus Protoplanetary Disks II: Gas Disk Radii
• Radiative Equilibrium and Temperature Correction in Monte Carlo Radiation Transfer
• Terrestrial Planet Occurrence Rates for the Kepler GK Dwarf Sample
• Rossby Wave Instability of Thin Accretion Disks -- II. Detailed Linear Theory
• A Kinematical Detection of Two Embedded Jupiter Mass Planets in HD 163296
• Kinematic evidence for an embedded protoplanet in a circumstellar disc
• Structure and evolution of pre-main sequence circumstellar disks
• A Three-Dimensional View of Turbulence: Constraints on Turbulent Motions in the HD 163296 Protoplanetary Disk using DCO${}^{+}$
• On planet formation in HL Tau
• Rossby Wave Instability of Thin Accretion Disks - III. Nonlinear Simulations
• Large dust particles in disks around T Tauri stars
• Dust grain growth in rho-Ophiuchi protoplanetary disks
• Large grains in the disk of CQ Tau
• Accelerated planetesimal growth in self-gravitating protoplanetary discs
• One Solution to the Mass Budget Problem for Planet Formation: Optically Thick Disks with Dust Scattering
• Multiple Disk Gaps and Rings Generated by a Single Super-Earth
• A search for evolved dust in Herbig Ae stars
• Possible planet-forming regions on submillimetre images
• The Disk Substructures at High Angular Resolution Project (DSHARP) - IX. A high definition study of the HD 163296 planet forming disk
• ALMA continuum observations of the protoplanetary disk AS 209. Evidence of multiple gaps opened by a single planet
• Reviving Dead Zones in Accretion Disks by Rossby Vortices at their Boundaries
• Towards Planetesimals in the Disk around TW Hya: 3.5 centimeter Dust Emission
• Protoplanetary disk rings and gaps across ages and luminosities
• CO and dust properties in the TW Hya disk from high-resolution ALMA observations
• A Multi-Ringed, Modestly-Inclined Protoplanetary Disk around AA Tau
• Survival of the mm-cm size grain population observed in protoplanetary disks
• VLA Imaging of the Disk Surrounding the Nearby Young Star TW Hya
• The anomalously low (sub)millimeter spectral indices of some protoplanetary disks may be explained by dust self-scattering
• Can dead zones create structures like a transition disk?
• Testing the theory of grain growth and fragmentation by millimeter observations of protoplanetary disks
• Potential Vorticity Evolution of a Protoplanetary Disk with An Embedded Protoplanet
• Type I Planet Migration in Nearly Laminar Disks
• Multiple Gaps in the Disk of the Class I Protostar GY 91
• Effects of dust feedback on vortices in protoplanetary disks
• Modeling Dust Emission of HL Tau Disk Based on Planet-Disk Interactions
• Magnetized Accretion and Dead Zones in Protostellar Disks
• The complex morphology of the young disk MWC 758: Spirals and dust clumps around a large cavity
• On the accumulation of solid bodies in global turbulent protoplanetary disc models
• Rings and gaps in the disc around Elias 24 revealed by ALMA
• Protoplanetary Disks in $\rho$ Ophiuchus as Seen From ALMA
• A Gap with a Deficit of Large Grains in the protoplanetary disk around TW Hya
• Constraints on properties of the protoplanetary disks around UX Ori and CQ Tau
• Observations of Solids in Protoplanetary Disks
• The effect of local optically thick regions in the long-wave emission of young circumstellar disks
• New constraints on turbulence and embedded planet mass in the HD 163296 disk from planet-disk hydrodynamic simulations
• Millimetre spectral indices of transition disks and their relation to the cavity radius
• V1094 Sco: a rare giant multi-ringed disk around a T Tauri star
• Long-Lived Dust Asymmetries at Dead Zone Edges in Protoplanetary Disks
• ALMA observations of Elias 2-24: a protoplanetary disk with multiple gaps in the Ophiuchus Molecular Cloud
• Giant Planet Formation by Disk Instability in Low Mass Disks?

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• Including Dust Coagulation in Hydrodynamic Models of Protoplanetary Disks: Dust Evolution in the Vicinity of a Jupiter-mass Planet
• Distribution of solids in the rings of the HD 163296 disk: a multiwavelength study
• How dust fragmentation may be beneficial to planetary growth by pebble accretion
• A Tale of Planet Formation: From Dust to Planets
• A Multi-Fluid Dust Module in Athena++: Algorithms and Numerical Tests
• The Preservation of Super Earths and the Emergence of Gas Giants after Their Progenitor Cores have Entered the Pebble Isolation Phase
• Planet-induced Vortices with Dust Coagulation in Protoplanetary Disks
• Meso-scale Instability Triggered by Dust Feedback in Dusty Rings: Origin and Observational Implications
• Dust growth, fragmentation and self-induced dust traps in PHANTOM
• On the Dust Signatures Induced by Eccentric Super-Earths in Protoplanetary Disks
• Dust Accumulation near the Magnetospheric Truncation of Protoplanetary Discs around T Tauri Stars
• Wide Dust Gaps in Protoplanetary Disks Induced by Eccentric Planets: A Mass-Eccentricity Degeneracy
• Ring Morphology with Dust Coagulation in Protoplanetary Disks
• Turbulent Transport of Dust Particles in Protostellar Disks: The Effect of Upstream Diffusion
• A smoothed particle hydrodynamics algorithm for multigrain dust with separate sets of particles
• Mid-infrared blends and continuum signatures of dust drift and accretion in protoplanetary disks
• O(N^2) fragmentation algorithm