Dust continuum emission and the upper limit fluxes of sub-millimeter water lines of the protoplanetary disk around HD 163296 observed by ALMA

Abstract

In this paper, we analyse the upper limit fluxes of sub-millimeter ortho-H${}_2$${}^{16}$O 321 GHz, para-H${}_2$${}^{18}$O 322 GHz, and HDO 335 GHz lines from the protoplanetary disk around the Herbig Ae star HD 163296, using the Atacama Large Millimeter/Submillimeter Array (ALMA). These water lines are considered to be the best candidate sub-millimeter lines to locate the position of the H${}_2$O snowline, on the basis of our previous model calculations. We compare the upper limit fluxes with the values calculated by our models with dust emission included, and we constrain the line emitting region and the dust opacity from the observations. We conclude that, if the outer edge of the region with high water vapor abundance and if the position of the water snowline are beyond 8 au also, the mm dust opacity will have a value larger than 2.0 cm${}^2$ g${}^{-1}$. In addition, the position of the water snowline will be inside 20 au, if the mm dust opacity is 2.0 cm${}^2$ g${}^{-1}$. Future observations of the dust continuum emission at higher angular resolution and sub-millimeter water lines with longer observation time are required to clarify the detailed structures and the position of the H${}_2$O snowline in the disk midplane.

17 pages, 8 figures, and 3 tables are contained in this paper. It was accepted for publication in The Astrophysical Journal (ApJ) on February 26th, 2019

References in corpus (34)

• Building Terrestrial Planets
• 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
• Origin of water in the inner Solar System: Planetesimals scattered inward during Jupiter and Saturn's rapid gas accretion
• H2O and OH gas in the terrestrial planet-forming zones of protoplanetary disks
• Imaging the water-snow line during a protostellar outburst
• Three radial gaps in the disk of TW Hydrae imaged with SPHERE
• Mass Estimates of a Giant Planet in a Protoplanetary Disk from the Gap Structures
• 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
• Formation of a disc gap induced by a planet: Effect of the deviation from Keplerian disc rotation
• Protoplanetary disk rings and gaps across ages and luminosities
• CO and dust properties in the TW Hya disk from high-resolution ALMA observations
• Mass inventory of the giant-planet formation zone in a solar nebula analog
• Discovery of a Disk Gap Candidate at 20 AU in TW Hydrae
• Formation of dust-rich planetesimals from sublimated pebbles inside of the snow line
• Can dead zones create structures like a transition disk?
• Dust Density Distribution and Imaging Analysis of Different Ice Lines in Protoplanetary Disks
• Polarized disk emission from Herbig Ae/Be stars observed using Gemini Planet Imager: HD 144432, HD 150193, HD 163296, and HD 169142
• Chemistry in Protoplanetary Disks: the gas-phase CO/H2 ratio and the Carbon reservoir
• The depletion of water during dispersal of planet-forming disk regions
• Millimetre spectral indices of transition disks and their relation to the cavity radius
• The Role of Ice Compositions for Snowlines and the C/N/O Ratios in Active Disks
• DCO${}^{+}$, DCN and N${}_2$D${}^{+}$ reveal three different deuteration regimes in the disk around the Herbig Ae star HD163296
• Upper limits on CH${}_3$OH in the HD 163296 protoplanetary disk: evidence for a low gas-phase CH${}_3$OH/H${}_2$CO ratio
• Increased H${}_2$CO production in the outer disk around HD 163296
• Candidate Water Vapor Lines to Locate the H${}_2$O Snowline through High-Dispersion Spectroscopic Observations II. The Case of a Herbig Ae Star
• Detections of trans-Neptunian ice in protoplanetary disks
• Non-linear Development of Secular Gravitational Instability in Protoplanetary Disks
• The abundance and thermal history of water ice in the disk surrounding HD142527 from the DIGIT Herschel Key Program
• A high resolution mid-infrared survey of water emission from protoplanetary disks
• What pebbles are made of: Interpretation of the V883 Ori disk
• High-resolution 25 μm imaging of the disks around Herbig Ae/Be stars
• Multi-Epoch Detections of Water Ice Absorption in Edge-on Disks around Herbig Ae Stars: PDS 144N and PDS 453
• The mid-IR water and silicate relation in protoplanetary disks

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