Radial variations in grain sizes and dust scale heights in the protoplanetary disk around HD 163296 revealed by ALMA polarization observation

Abstract

The HD 163296 disk shows ring and gap substructures with ALMA observations. In addition, this is the only disk where the rings and gaps are spatially resolved in millimeter-wave polarization measurements. In this paper, we conduct radiative transfer modeling that includes self-scattering polarization to constrain the grain size and its distribution. We found that the grain size and dust scale height are the key parameters for reproducing the radial and azimuthal distributions of the observed polarization signature. Radial variation is mainly determined by grain size. The polarization fraction is high if the particle size is $\sim \lambda /2\pi$; it is low if the particle size is larger or smaller than this. In contrast, azimuthal variation in polarization is enhanced if the dust scale height is increased. Based on detailed modeling of the HD 163296 polarization, we found the following radial variations in the grain size and dust scale height. The maximum grain size was 140 microns in the gaps and significantly larger or smaller in the rings. The dust scale height is less than one-third the gas scale height inside the 70 au ring, and two-thirds the gas scale height outside the 70 au ring. Furthermore, we constrained the gas turbulence to be $\alpha \lesssim 1.5\times 10^{-3}$ in the 50 au gap and $\alpha \sim 0.015-0.3$ in the 90 au gap. The transition of the turbulence strength at the boundary of the 70 au ring indicates the existence of a dead zone.

24 pages, 21 figures, accepted for publication in ApJ

References in corpus (36)

• Particle Stirring in Turbulent Gas Disks: Including Orbital Oscillations
• Radiative torques: Analytical Model and Basic Properties
• Tracing Magnetic Fields with Aligned Grains
• Magnetic Fields in the Formation of Sun-Like Stars
• Gaps, Rings, and Non-Axisymmetric Structures in Protoplanetary Disks - From Simulations to ALMA Observations
• Evidence of fast pebble growth near condensation fronts in the HL Tau protoplanetary disk
• A Three-Dimensional View of Turbulence: Constraints on Turbulent Motions in the HD 163296 Protoplanetary Disk using DCO${}^{+}$
• One Solution to the Mass Budget Problem for Planet Formation: Optically Thick Disks with Dust Scattering
• Heat and Dust in Active Layers of Protostellar Disks
• The origin of hydrogen line emission for five Herbig Ae/Be stars spatially resolved by VLTI/AMBER spectro-interferometry
• Protoplanetary disk rings and gaps across ages and luminosities
• The evidence of radio polarization induced by the radiative grain alignment and self-scattering of dust grains in a protoplanetary disk
• The anomalously low (sub)millimeter spectral indices of some protoplanetary disks may be explained by dust self-scattering
• Millimeter imaging of HD 163296: probing the disk structure and kinematics
• Can dead zones create structures like a transition disk?
• Spatially Resolved Magnetic Field Structure in the Disk of a T Tauri Star
• ALMA Reveals Transition of Polarization Pattern with Wavelength in HL Tau's Disk
• Submillimeter polarization observation of the protoplanetary disk around HD 142527
• ALMA observations of dust polarization and molecular line emission from the Class 0 protostellar source Serpens SMM1
• A cavity and further radial substructures in the disk around HD~97048
• Gas and dust structures in protoplanetary disks hosting multiple planets
• Grain Alignment and Polarized Emission from Magnetized T Tauri Disks
• The HD 163296 Circumstellar Disk in Scattered Light: Evidence of Time-Variable Self-Shadowing
• Dust-trapping vortices and a potentially planet-triggered spiral wake in the pre-transitional disk of V1247 Orionis
• Dust-driven viscous ring-instability in protoplanetary disks
• Dust settling against hydrodynamic turbulence in protoplanetary discs
• Nonsticky Ice at the Origin of the Uniformly Polarized Submillimeter Emission from the HL Tau Disk
• HD 169142 in the eyes of ZIMPOL/SPHERE
• Investigating dust trapping in transition disks with millimeter-wave polarization
• ALMA observations of Elias 2-24: a protoplanetary disk with multiple gaps in the Ophiuchus Molecular Cloud
• Magnetic fields in protoplanetary disks: from MHD simulations to ALMA observations
• Non-linear Development of Secular Gravitational Instability in Protoplanetary Disks
• Millimeter-wave polarization due to grain alignment by the gas flow in protoplanetary disks
• Dust continuum emission and the upper limit fluxes of sub-millimeter water lines of the protoplanetary disk around HD 163296 observed by ALMA
• Determining mass limits around HD163296 through SPHERE direct imaging data
• The Nonlinear Ohm's Law: Plasma Heating by Strong Electric Fields and its Effects on the Ionization Balance in Protoplanetary Disks

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