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Title: Long-lived Dust Asymmetries at Dead Zone Edges in Protoplanetary Disks

Journal Article · · The Astrophysical Journal (Online)

A number of transition disks exhibit significant azimuthal asymmetries in thermal dust emission. One possible origin for these asymmetries is dust trapping in vortices formed at the edges of dead zones. We carry out high-resolution, two-dimensional hydrodynamic simulations of this scenario, including the effects of dust feedback. We find that, although feedback weakens the vortices and slows down the process of dust accumulation, the dust distribution in the disk can nonetheless remain asymmetric for many thousands of orbits. We show that even after 104 orbits, or 2.5 Myr when scaled to the parameters of Oph IRS 48 (a significant fraction of its age), the dust is not dispersed into an axisymmetric ring, in contrast to the case of a vortex formed by a planet. This is because accumulation of mass at the dead zone edge constantly replenishes the vortex, preventing it from being fully destroyed. We produce synthetic dust emission images using our simulation results. We find that multiple small clumps of dust may be distributed azimuthally. These clumps, if not resolved from one another, appear as a single large feature. A defining characteristic of a disk with a dead zone edge is that an asymmetric feature is accompanied by a ring of dust located about twice as far from the central star.

Research Organization:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE Laboratory Directed Research and Development (LDRD) Program
Grant/Contract Number:
89233218CNA000001
OSTI ID:
1631572
Report Number(s):
LA-UR-20-20197; TRN: US2200979
Journal Information:
The Astrophysical Journal (Online), Vol. 835, Issue 2; ISSN 1538-4357
Publisher:
Institute of Physics (IOP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 29 works
Citation information provided by
Web of Science

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Cited By (22)

The Eccentric Cavity, Triple Rings, Two-armed Spirals, and Double Clumps of the MWC 758 Disk journal June 2018
Effects of Ringed Structures and Dust Size Growth on Millimeter Observations of Protoplanetary Disks journal June 2019
On the Dust Signatures Induced by Eccentric Super-Earths in Protoplanetary Disks journal November 2019
Are inner disc misalignments common? ALMA reveals an isotropic outer disc inclination distribution for young dipper stars journal December 2019
The Observability of Vortex-driven Spiral Arms in Protoplanetary Disks: Basic Spiral Properties journal September 2019
New Constraints on Turbulence and Embedded Planet Mass in the HD 163296 Disk from Planet–Disk Hydrodynamic Simulations journal April 2018
Identifying Anticyclonic Vortex Features Produced by the Rossby Wave Instability in Protoplanetary Disks journal October 2018
Ring Morphology with Dust Coagulation in Protoplanetary Disks journal January 2020
Evidence for a massive dust-trapping vortex connected to spirals: Multi-wavelength analysis of the HD 135344B protoplanetary disk journal November 2018
Including Dust Coagulation in Hydrodynamic Models of Protoplanetary Disks: Dust Evolution in the Vicinity of a Jupiter-mass Planet journal November 2019
Observational diagnostics of elongated planet-induced vortices with realistic planet formation time-scales journal November 2018
Dust Unveils the Formation of a Mini-Neptune Planet in a Protoplanetary Ring journal June 2019
The Disk Substructures at High Angular Resolution Project (DSHARP). IX. A High-definition Study of the HD 163296 Planet-forming Disk journal December 2018
Parametric Study of the Rossby Wave Instability in a Two-dimensional Barotropic Disk. II. Nonlinear Calculations journal August 2018
Analysis of Numerical Algorithms for Computing Rapid Momentum Transfers between the Gas and Dust in Simulations of Circumstellar Disks journal July 2018
Multiple Disk Gaps and Rings Generated by a Single Super-Earth. II. Spacings, Depths, and Number of Gaps, with Application to Real Systems journal October 2018
The Eccentric Cavity, Triple Rings, Two-Armed Spirals, and Double Clumps of the MWC 758 Disk text January 2018
Parametric Study of the Rossby Wave Instability in a Two-dimensional Barotropic Disk II: Non-Linear Calculations text January 2018
Analysis of Numerical Algorithms for Computing Rapid Momentum Transfers between the Gas and Dust in Simulations of Circumstellar Disks text January 2018
The Disk Substructures at High Angular Resolution Project (DSHARP) - IX. A high definition study of the HD 163296 planet forming disk text January 2018
The Observability Of Vortex-Driven Spiral Arms In Protoplanetary Disk: Basic Spiral Properties text January 2019
On the Dust Signatures Induced by Eccentric Super-Earths in Protoplanetary Disks text January 2019

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