Dust Rings and Cavities in the Protoplanetary Disks around HD 163296 and DoAr 44

Abstract

We model substructure in the protoplanetary disks around DoAr 44 and HD 163296 in order to better understand the conditions under which planets may form. We match archival millimeter-wavelength thermal emission against models of the disks' structure that are in radiation balance with the starlight heating and in vertical hydrostatic equilibrium, and then compare to archival polarized scattered near-infrared images of the disks. The millimeter emission arises in the interior, while the scattered near-infrared radiation probes the disks' outer layers. Our best model of the HD 163296 disk has dust masses $81\pm 13$ $M_{\oplus }$ in the inner ring at 68 au and $82_{-16}^{+26}$ $M_{\oplus }$ in the outer ring at 102 au, both falling within the range of estimates from previous studies. Our DoAr 44 model has total dust mass $84_{-3.5}^{+7.0}$ $M_{\oplus }$. Unlike HD 163296, DoAr 44 as of yet has no detected planets. If the central cavity in the DoAr 44 disk is caused by a planet, the planet's mass must be at least 0.5 $M_J$ and is unlikely to be greater than 1.6 $M_J$. We demonstrate that the DoAr 44 disk's structure with a bright ring offset within a fainter skirt can be formed by dust particles drifting through a plausible distribution of gas.

18 pages, 19 figures

References in corpus (15)

• Separating gas-giant and ice-giant planets by halting pebble accretion
• Evidence of fast pebble growth near condensation fronts in the HL Tau protoplanetary disk
• Protoplanetary disk rings and gaps across ages and luminosities
• The Ophiuchus DIsc Survey Employing ALMA (ODISEA)-III: the evolution of substructures in massive discs at 3-5 au resolution
• Polarized disk emission from Herbig Ae/Be stars observed using Gemini Planet Imager: HD 144432, HD 150193, HD 163296, and HD 169142
• Estimate on dust scale height from ALMA dust continuum image of the HD 163296 protoplanetary disk
• A new planet candidate detected in a dust gap of the disc around HD 163296 through localised kinematic signatures. An observational validation of the Discminer
• Distribution of solids in the rings of the HD 163296 disk: a multiwavelength study
• Molecules with ALMA at Planet-forming Scales (MAPS). A Circumplanetary Disk Candidate in Molecular Line Emission in the AS 209 Disk
• Thermal torque effects on the migration of growing low-mass planets
• HST/WFC3 H$\alpha$ Direct-Imaging Detection of a Point-like Source in the Disk Cavity of AB Aur
• Interpreting high spatial resolution line observations of planet-forming disks with gaps and rings -- The case of HD 163296
• Planet Shadows in Protoplanetary Disks. II: Observable Signatures
• Planet Shadows in Protoplanetary Disks. I: Temperature Perturbations
• Polarization reversal of scattered thermal dust emission in protoplanetary disks at (sub-)mm wavelengths

Cited by in corpus (3)

• TriPoD: Tri-Population size distributions for Dust evolution. Coagulation in vertically integrated hydrodynamic simulations of protoplanetary disks
• CAMPOS II. The onset of protostellar disk substructures and planet formation
• Multi-scale radiative-transfer model of the protoplanetary disc DoAr 44