Water vapor distribution in protoplanetary disks

Abstract

Water vapor has been detected in protoplanetary disks. In this work we model the distribution of water vapor in protoplanetary disks with a thermo-chemical code. For a set of parameterized disk models, we calculate the distribution of dust temperature and radiation field of the disk with a Monte Carlo method, and then solve the gas temperature distribution and chemical composition. The radiative transfer includes detailed treatment of scattering by atomic hydrogen and absorption by water of Lyman alpha photons, since the Lyman alpha line dominates the UV spectrum of accreting young stars. In a fiducial model, we find that warm water vapor with temperature around 300 K is mainly distributed in a small and well-confined region in the inner disk. The inner boundary of the warm water region is where the shielding of UV field due to dust and water itself become significant. The outer boundary is where the dust temperature drops below the water condensation temperature. A more luminous central star leads to a more extended distribution of warm water vapor, while dust growth and settling tends to reduce the amount of warm water vapor. Based on typical assumptions regarding the elemental oxygen abundance and the water chemistry, the column density of warm water vapor can be as high as 1E22 cm^{-2}. A small amount of hot water vapor with temperature higher than ~300 K exists in a more extended region in the upper atmosphere of the disk. Cold water vapor with temperature lower than 100 K is distributed over the entire disk, produced by photodesorption of the water ice.

Published in ApJ

References in corpus (61)

• Complex Chemistry in Star-Forming Regions: An Expanded Gas-Grain Warm-up Chemical Model
• Structure of Stationary Photodissociation Fronts
• Protoplanetary Disk Structures in Ophiuchus
• Evidence for a developing gap in a 10 Myr old protoplanetary disk
• Rosseland and Planck Mean Opacities for Protoplanetary Discs
• The photodissociation and chemistry of CO isotopologues: applications to interstellar clouds and circumstellar disks
• Flaring vs. self-shadowed disks: the SEDs of Herbig Ae/Be stars
• The effect of dust settling on the appearance of protoplanetary disks
• Radiation thermo-chemical models of protoplanetary disks I. Hydrostatic disk structure and inner rim
• Photoevaporation of Circumstellar Disks by FUV, EUV and X-ray Radiation from the Central Star
• Radiation-Hydrodynamic Models of X-Ray & EUV Photoevaporating Protoplanetary Discs
• Radiative Equilibrium and Temperature Correction in Monte Carlo Radiation Transfer
• Thermal Desorption of Water-Ice in the Interstellar Medium
• Photodesorption of Ices II: H2O and D2O
• Detection of the Water Reservoir in a Forming Planetary System
• The c2d Spitzer spectroscopic survey of ices around low-mass young stellar objects II: CO2
• Photodesorption of ices I: CO, N2 and CO2
• Simulation of the Formation and Morphology of Ice Mantles on Interstellar Grains
• The warm gas atmosphere of the HD 100546 disk seen by Herschel (Evidence of a gas-rich, carbon-poor atmosphere?)
• Radiative transfer in very optically thick circumstellar disks
• H2O and OH gas in the terrestrial planet-forming zones of protoplanetary disks
• A Spitzer survey of mid-infrared molecular emission from protoplanetary disks I: Detection rates
• The FUV spectrum of TW Hya. I. Observations of H${}_2$ Fluorescence
• Exclusion of Cosmic Rays in Protoplanetary Disks: Stellar and Magnetic Effects
• A Spitzer Survey of Mid-Infrared Molecular Emission from Protoplanetary Disks II: Correlations and LTE Models
• Effect of Ambipolar Diffusion on the Non-linear Evolution of Magnetorotational Instability in Weakly Ionized Disks
• The Far-Ultraviolet Spectra of TW Hya. II. Models of H2 Fluorescence in a Disk
• [CII] 158$\mu$m Emission and Metallicity in PDRs
• Far-infrared Fine-Structure Line Diagnostics of Ultraluminous Infrared Galaxies
• The Effects of UV Continuum and Lyman alpha Radiation on the Chemical Equilibrium of T Tauri Disks
• The chemistry of vibrationally excited H2 in the interstellar medium
• Hot H2O Emission and Evidence for Turbulence in the Disk of a Young Star
• Chemistry of a protoplanetary disk with grain settling and Lyman alpha radiation
• Evidence for a Snow Line Beyond the Transitional Radius in the TW Hya Protoplanetary Disk
• Formation of Water in the Warm Atmospheres of Protoplanetary Disks
• Cosmic-ray and X-ray Heating of Interstellar Clouds and Protoplanetary Disks
• The propagation of Lyman-alpha in evolving protoplanetary disks
• Chemo-dynamical deuterium fractionation in the early solar nebula: The origin of water on Earth and in asteroids and comets
• Sensitive limits on the abundance of cold water vapor in the DM Tau protoplanetary disk
• Water in Protoplanetary Disks: Deuteration and Turbulent Mixing
• Spectrally resolved pure rotational lines of water in protoplanetary disks
• X-ray impact on the protoplanetary disks around T Tauri stars
• Gas phase water in the surface layer of protoplanetary disks
• The HCN-Water Ratio in the Planet Formation Region of Disks
• Chemical Modelling of Young Stellar Objects, I. Method and Benchmarks
• Chemical evolution of protoplanetary disks - the effects of viscous accretion, turbulent mixing and disk winds
• Detection of warm water vapour in Taurus protoplanetary discs by Herschel
• Lyman alpha dominance of the Classical T Tauri FUV Radiation Field
• Uncertainties in water chemistry in disks: An application to TW Hya
• Multidimensional chemical modelling, II. Irradiated outflow walls
• Hot and cool water in Herbig Ae protoplanetary disks. A challenge for Herschel
• Sticking coefficient of hydrogen and deuterium on silicates under interstellar conditions
• Photoelectric cross-sections of gas and dust in protoplanetary disks
• FUV and X-ray irradiated protoplanetary disks: a grid of models I. The disk structure
• Warm H2O and OH in the disk around the Herbig star HD 163296
• Structure and Instabilities of an Irradiated Viscous Protoplanetary Disk
• Shielding by Water and OH in FUV and X-ray Irradiated Protoplanetary Disks
• Transition disk chemistry and future prospects with ALMA
• The dynamical structure of isotropic spherical galaxies with a central black hole
• Evaporation of ion-irradiated disks
• Warm H2O and OH disk emission in V1331 Cyg

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• Consistent dust and gas models for protoplanetary disks. I. Disk shape, dust settling, opacities, and PAHs
• Astrochemistry and compositions of planetary systems
• The molecular composition of the planet-forming regions of protoplanetary disks across the luminosity regime
• Hydrocarbon emission rings in protoplanetary disks induced by dust evolution
• Molecules with ALMA at Planet-forming Scales (MAPS) V: CO gas distributions
• Origin of Earth's water: sources and constraints
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• Solar System Formation in the Context of Extra-Solar Planets
• Systematic Variations of CO Gas Abundance with Radius in Gas-rich Protoplanetary Disks
• Hints for icy pebble migration feeding an oxygen-rich chemistry in the inner planet-forming region of disks
• Consistent dust and gas models for protoplanetary disks III. Models for selected objects from the FP7 DIANA project
• 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
• Volatile depletion in the TW Hydrae disk atmosphere
• Survey of cold water lines in protoplanetary disks: indications of systematic volatile depletion
• Measurements of water surface snow lines in classical protoplanetary disks
• The determination of protoplanetary disk masses
• The TW Hya Rosetta Stone Project III: Resolving the Gaseous Thermal Profile of the Disk
• The chemistry of disks around T Tauri and Herbig Ae/Be stars
• Origins Space Telescope Mission Concept Study Report
• Excess C/H in Protoplanetary Disk Gas from Icy Pebble Drift across the CO Snowline
• The kinematics and excitation of infrared water vapor emission from planet-forming disks: results from spectrally-resolved surveys and guidelines for JWST spectra
• Observational Signatures of Tightly Wound Spirals Driven by Buoyancy Resonances in Protoplanetary Disks
• Understanding the water emission in the mid- and far-IR from protoplanetary disks around T~Tauri stars
• Candidate Water Vapor Lines to Locate the H${}_2$O Snowline through High-Dispersion Spectroscopic Observations II. The Case of a Herbig Ae Star
• Candidate Water Vapor Lines to Locate the H${}_2$O Snowline through High-Dispersion Spectroscopic Observations I. The Case of a T Tauri Star
• Destruction of refractory carbon grains drives the final stage of proto-planetary disk chemistry
• Mid-IR spectra of Pre-Main Sequence Herbig stars: an explanation for the non-detections of water lines
• Probing planet formation and disk substructures in the inner disk of Herbig Ae stars with CO rovibrational emission
• Chemical Evolution in a Protoplanetary Disk within Planet Carved Gaps and Dust Rings
• Detection of water vapor in the terrestrial planet forming region of a transition disk
• Warm dust surface chemistry in protoplanetary disks. Formation of phyllosilicates
• Chemical footprints of giant planet formation. Role of planet accretion in shaping the C/O ratio of protoplanetary disks
• FUV Irradiated Disk Atmospheres: Ly$\alpha$ and the Origin of Hot H${}_2$ Emission
• An H-band Vector Vortex Coronagraph for the Subaru Coronagraphic Extreme-Adaptive Optics System
• Chemical modeling of Orion Nebula Cluster disks: evidence for massive, compact gas disks with ISM-like gas-to-dust ratios
• A localized kinematic structure detected in atomic carbon emission spatially coincident with a proposed protoplanet in the HD 163296 disk
• FUV Irradiation and the Heat Signature of Accretion in Protoplanetary Disk Atmospheres
• H${}_2$O distribution in the disc of HD 100546 and HD 163296: the role of dust dynamics and planet--disc interaction
• Water shielding in the terrestrial planet-forming zone: Implication for inner disk organics
• CLIcK: a Continuum and Line fItting Kit for circumstellar disks
• Modeling Nitrogen Fractionation in the Protoplanetary Disk around TW Hya: Model Constraints on Grain Population and Carbon-to-Oxygen Elemental Abundance Ratio
• Estimating the EOS from the measurement of NS radii with 5% accuracy
• Signatures of Hot Molecular Hydrogen Absorption from Protoplanetary Disks: I. Non-thermal Populations
• Using HCO${}^{+}$ isotopologues as tracers of gas depletion in protoplanetary disk gaps
• Chempl: a playable package for modeling interstellar chemistry
• Cold Deuterium Fractionation in the Nearest Planet-Forming Disk
• Chemistry During the Gas-rich Stage of Planet Formation
• The gas disk: Evolution and chemistry
• We Drink Good 4.5-Billion-Year-Old Water
• Shaping the CO snowline in protoplanetary disks
• A Study of Ro-vibrational OH Emission from Herbig Ae/Be Stars
• Testing planet formation from the ultraviolet to the millimeter
• Tracking the Chemical Evolution of Hydrocarbons Through Carbon Grain Supply in Protoplanetary Disks
• Chemical evolution during the formation of molecular clouds
• An unusual reservoir of water emission in the VV CrA A protoplanetary disk
• Molecules with ALMA at Planet-forming Scales (MAPS) VIII: CO Gap in AS 209--Gas Depletion or Chemical Processing?
• The Prospects for Hurricane-like Vortices in Protoplanetary Disks
• Molecules with ALMA at Planet-forming Scales. XX. The Massive Disk Around GM Aurigae
• Molecules with ALMA at Planet-forming Scales (MAPS) XVII: Determining the 2D Thermal Structure of the HD 163296 Disk
• H3+ in irradiated protoplanetary disks: Linking far-ultraviolet radiation and water vapor
• Water vapor as a probe of the origin of gas in debris disks
• Protoplanetary Disk Chemistry
• Impact of Size-dependent Grain Temperature on Gas-Grain Chemistry in Protoplanetary Disks: the case of low mass star disks