Disk Substructures at High Angular Resolution Program (DSHARP): VIII. The Rich Ringed Substructures in the AS 209 Disk

Abstract

We present a detailed analysis of the high-angular resolution (0.''037, corresponding to 5 au) observations of the 1.25 mm continuum and ${}^{12}$CO $2-1$ emission from the disk around the T Tauri star AS 209. AS 209 hosts one of the most unusual disks from the DSHARP sample, the first high angular resolution ALMA survey of disks (Andrews et al. 2018), as nearly all of the emission can be explained with concentric Gaussian rings. In particular, the dust emission consists of a series of narrow and closely spaced rings in the inner $\sim$60 au, two well-separated bright rings in the outer disk, centered at 74 and 120 au, and at least two fainter emission features at 90 and 130 au. We model the visibilities with a parametric representation of the radial surface brightness profile, consisting of a central core and 7 concentric Gaussian rings. Recent hydro-dynamical simulations of low viscosity disks show that super-Earth planets can produce the multiple gaps seen in AS 209 millimeter continuum emission. The ${}^{12}$CO line emission is centrally peaked and extends out to $\sim$300 au, much farther than the millimeter dust emission. We find axisymmetric, localized deficits of CO emission around four distinct radii, near 45, 75, 120 and 210 au. The outermost gap is located well beyond the edge of the millimeter dust emission, and therefore cannot be due to dust opacity and must be caused by a genuine CO surface density reduction, due either to chemical effects or depletion of the overall gas content.

arXiv commentApJ Letters, in press

References in corpus (50)

• Gaia Data Release 2. Summary of the contents and survey properties
• 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
• The effects of snowlines on C/O in planetary atmospheres
• Coagulation, fragmentation and radial motion of solid particles in protoplanetary disks
• Protoplanetary Disk Structures in Ophiuchus
• Gas- and dust evolution in protoplanetary disks
• On the width and shape of gaps in protoplanetary disks
• Ringed Substructure and a Gap at 1 AU in the Nearest Protoplanetary Disk
• Radial Flow of Dust Particles in Accretion Disks
• 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
• Gaps, Rings, and Non-Axisymmetric Structures in Protoplanetary Disks - From Simulations to ALMA Observations
• Trapping dust particles in the outer regions of protoplanetary disks
• Evidence of fast pebble growth near condensation fronts in the HL Tau protoplanetary disk
• Sintering-induced Dust Ring Formation in Protoplanetary Disks: Application to the HL Tau Disk
• Kinematic evidence for an embedded protoplanet in a circumstellar disc
• Planetesimal formation starts at the snow line
• Global simulations of protoplanetary disks with net magnetic flux: I. Non-ideal MHD case
• Planetesimal formation near the snowline: in or out?
• Constraints on the Radial Variation of Grain Growth in the AS 209 Circumstellar Disk
• Planets opening dust gaps in gas disks
• A Spatially Resolved Vertical Temperature Gradient in the HD 163296 Disk
• A Millimeter Continuum Size-Luminosity Relationship for Protoplanetary Disks
• A multi-wavelength analysis for interferometric (sub-)mm observations of protoplanetary disks: radial constraints on the dust properties and the disk structure
• Multiple Disk Gaps and Rings Generated by a Single Super-Earth
• The minimum mass of detectable planets in protoplanetary discs and the derivation of planetary masses from high resolution observations
• 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
• The Disk Substructures at High Angular Resolution Project (DSHARP): III. Spiral Structures in the Millimeter Continuum of the Elias 27, IM Lup, and WaOph 6 Disks
• Survival of the mm-cm size grain population observed in protoplanetary disks
• On the formation of multiple concentric rings and gaps in protoplanetary disks
• Magnetic Flux Concentration and Zonal Flows in Magnetorotational Instability Turbulence
• The formation of rings and gaps in magnetically coupled disk-wind systems: ambipolar diffusion and reconnection
• What is the Mass of a Gap-Opening Planet?
• A Close-up View of the Young Circumbinary Disk HD 142527
• Rings and gaps in the disc around Elias 24 revealed by ALMA
• Hall-effect Mediated Magnetic Flux Transport in Protoplanetary Disks
• An opening criterion for dust gaps in protoplanetary discs
• Redistribution of CO at the Location of the CO Ice Line in evolving Gas and Dust Disks
• Attenuation of Millimeter Emission from Circumstellar Disks Induced by the Rapid Dust Accretion
• Empirical Temperature Measurement in Protoplanetary Disks
• Multiple Carbon monoxide Snow-lines in Disks Sculpted by Radial Drift
• Evidence for a CO desorption front in the outer AS 209 disk
• Radial Transport of Large-Scale Magnetic Fields in Accretion Disks. I. Steady Solutions and an Upper Limit on the Vertical Field Strength
• Efficiency of Particle Trapping in the Outer Regions of Protoplanetary Disks
• Global evolution of the magnetic field in a thin disc and its consequences for protoplanetary systems
• Rossby wave instability does not require sharp resistivity gradients
• ALMA observations of Elias 2-24: a protoplanetary disk with multiple gaps in the Ophiuchus Molecular Cloud

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• The Disk Substructures at High Angular Resolution Project (DSHARP): I. Motivation, Sample, Calibration, and Overview
• The Disk Substructures at High Angular Resolution Project (DSHARP): II. Characteristics of Annular Substructures
• The Disk Substructures at High Angular Resolution Project (DSHARP): VII. The Planet-Disk Interactions Interpretation
• The Disk Substructures at High Angular Resolution Project (DSHARP) VI: Dust trapping in thin-ringed protoplanetary disks
• Molecules with ALMA at Planet-forming Scales (MAPS) I: Program Overview and Highlights
• One Solution to the Mass Budget Problem for Planet Formation: Optically Thick Disks with Dust Scattering
• Nine localised deviations from Keplerian rotation in the DSHARP circumstellar disks: Kinematic evidence for protoplanets carving the gaps
• Molecules with ALMA at Planet-forming Scales (MAPS) XIV: Revealing disk substructures in multi-wavelength continuum emission
• A multi-frequency ALMA characterization of substructures in the GM Aur protoplanetary disk
• The efficiency of dust trapping in ringed proto-planetary discs
• Frankenstein: Protoplanetary disc brightness profile reconstruction at sub-beam resolution with a rapid Gaussian process
• Molecules with ALMA at Planet-forming Scales (MAPS). VII. Sub-stellar O/H and C/H and super-stellar C/O in planet feeding gas
• Spiral Arms and a Massive Dust Disk with non-Keplerian Kinematics: Possible Evidence for Gravitational Instability in the Disk of Elias 2-27
• Probing CO and N${}_2$ Snow Surfaces in Protoplanetary Disks with N${}_2$H${}^{+}$ Emission
• Molecules with ALMA at Planet-forming Scales (MAPS). IX. Distribution and Properties of the Large Organic Molecules HC${}_3$N, CH${}_3$CN, and $c$-C${}_3$H${}_2$
• Molecules with ALMA at Planet-forming Scales (MAPS). A Circumplanetary Disk Candidate in Molecular Line Emission in the AS 209 Disk
• New Constraints From Dust Lines On The Surface Densities Of Protoplanetary Disks
• Limits on Millimeter Continuum Emission from Circumplanetary Material in the DSHARP Disks
• The effects of disk self-gravity and radiative cooling on the formation of gaps and spirals by young planets
• The Disc Miner II: Revealing Gas substructures and Kinematic signatures from Planet-disc interaction through line profile analysis
• The composition of hot Jupiter atmospheres assembled within chemically evolved protoplanetary discs
• Revealing signatures of planets migrating in protoplanetary discs with ALMA multi-wavelength observations
• An empirically-derived formula for the shape of planet-induced gaps in protoplanetary disks
• ALMA 870 $\mu$m continuum observations of HD 100546. Evidence of a giant planet on a wide orbit
• Survival of ALMA Rings in the Absence of Pressure Maxima
• Molecules with ALMA at Planet-forming Scales (MAPS). X. Studying deuteration at high angular resolution toward protoplanetary disks
• Chemical Evolution in a Protoplanetary Disk within Planet Carved Gaps and Dust Rings
• Substructures in Compact Disks of the Taurus Star-forming Region
• An Observational Study for Grain Dynamics in the AS 209 Disk with Submillimeter Polarization
• Meso-scale Instability Triggered by Dust Feedback in Dusty Rings: Origin and Observational Implications
• Modeling planet-induced gaps and rings in ALMA disks: the role of in-plane radiative diffusion
• Hidden Planets: Implications from 'Oumuamua and DSHARP
• A search for companions via direct imaging in the DSHARP planet-forming disks
• Chemical signatures of a warped protoplanetary disc
• Planet gap opening across stellar masses
• Molecules with ALMA at Planet-forming Scales (MAPS). Complex Kinematics in the AS 209 Disk Induced by a Forming Planet and Disk Winds
• PGNets: Planet mass prediction using convolutional neural networks for radio continuum observations of protoplanetary disks
• Self-consistent ring model in protoplanetary disks: temperature dips and substructure formation
• Implementation of dust particles in three-dimensional magnetohydrodynamics simulation: Dust dynamics in a collapsing cloud core
• Regularized Maximum Likelihood Image Synthesis and Validation for ALMA Continuum Observations of Protoplanetary Disks
• A Machine Learning model to infer planet masses from gaps observed in protoplanetary disks
• Using HCO${}^{+}$ isotopologues as tracers of gas depletion in protoplanetary disk gaps
• CAMPOS II. The onset of protostellar disk substructures and planet formation
• Model of a gap formed by a planet with fast inward migration
• UV Fluorescence Traces Gas and LyA Evolution in Protoplanetary Disks
• NaCo polarimetric observations of Sz 91 transitional disk: a remarkable case of dust filtering
• Direct Measurement of Extinction in a Planet-Hosting Gap
• Multi-frequency analysis of the ALMA and VLA high resolution continuum observations of the substructured disc around CI Tau. Preference for sub-mm-sized low-porosity amorphous carbon grains
• Kinematics signature of a giant planet in the disk of AS 209
• Testing planet formation from the ultraviolet to the millimeter
• Estimating the depth of gaps opened by planets in eccentric orbit
• Dust Drift Timescales in Protoplanetary Disks at the Cusp of Gravitational Instability
• Molecules with ALMA at Planet-forming Scales (MAPS) VIII: CO Gap in AS 209--Gas Depletion or Chemical Processing?
• Molecules with ALMA at Planet-forming Scales (MAPS) III: Characteristics of Radial Chemical Substructures
• Molecules with ALMA at Planet-forming Scales (MAPS). XV. Tracing protoplanetary disk structure within 20 au
• vis-r: Quick radial profile modelling for radio interferometric visibilities
• Protoplanetary Disk Chemistry
• Gravitational instability in planet-forming discs
• Molecules with ALMA at Planet-forming Scales (MAPS) II: CLEAN Strategies for Synthesizing Images of Molecular Line Emission in Protoplanetary Disks
• Searching for Embedded Protoplanets with the Keck/NIRC2 Vortex Coronagraph: Confirmation of a Core-accretion Planet in the Narrow Gap of the Elias 2-24 Disk