Interpreting molecular hydrogen and atomic oxygen line emission of T Tauri disks with photoevaporative disk-wind models

Abstract

Winds in protoplanetary disks play an important role in their evolution and dispersal. However, what physical process is driving the winds is still unclear (i.e. magnetically vs thermally driven), and can only be understood by directly confronting theoretical models with observational data. We use hydrodynamic photoevaporative disk-wind models and post-process them with a thermo-chemical model to produce synthetic observables for the o-H${}_2$ at 2.12 micron and [OI] at 0.63 micron spectral lines and directly compare the results to a sample of observations. Our photoevaporative disk-wind model is consistent with the observed signatures of the blueshifted narrow low-velocity component (NLVC), which is usually associated with slow disk winds, for both tracers. Only for one out of seven targets that show blueshifted NLVCs does the photoevaporative model fail to explain the observed line kinematics. Our results also indicate that interpreting spectral line profiles by simple methods, such as the thin-disk approximation, to determine the line emitting region can yield misleading conclusions. The photoevaporative disk-wind models are largely consistent with the studied observational data set, but it is not possible to clearly discriminate between different wind-driving mechanisms. Further improvements to the models, such as consistent modelling of the dynamics and chemistry and detailed modelling of individual targets would be beneficial. Furthermore, a direct comparison of magnetically driven disk-wind models to the observational data set is necessary in order to determine whether or not spatially unresolved observations of multiple wind tracers are sufficient to discriminate between theoretical models.

arXiv comment14 pages, 13 figures, accepted for publication in A&A

References in corpus (71)

• SciPy 1.0--Fundamental Algorithms for Scientific Computing in Python
• Astropy: A Community Python Package for Astronomy
• Binary companions of evolved stars in APOGEE DR14: Search method and catalog of ~5,000 companions
• PLUTO: a Numerical Code for Computational Astrophysics
• An atomic and molecular database for analysis of submillimetre line observations
• The UMIST database for astrochemistry 2012
• Structure of Stationary Photodissociation Fronts
• Radiation thermo-chemical models of protoplanetary disks I. Hydrostatic disk structure and inner rim
• Consistent dust and gas models for protoplanetary disks. I. Disk shape, dust settling, opacities, and PAHs
• Radiation-Hydrodynamic Models of X-Ray & EUV Photoevaporating Protoplanetary Discs
• Time-Evolution of Viscous Circumstellar Disks due to Photoevaporation by FUV, EUV and X-ray Radiation from the Central Star
• Mocassin: A fully three-dimensional Monte Carlo photoionization code
• A Spatially Resolved Vertical Temperature Gradient in the HD 163296 Disk
• Molecular hydrogen formation in the interstellar medium
• The dusty MOCASSIN: fully self-consistent 3D photoionisation and dust radiative transfer models
• X-ray irradiated protoplanetary disk atmospheres I: Predicted emission line spectrum and photoevaporation
• [O I] 6300A emission in Herbig Ae/Be systems: signature of Keplerian rotation
• The structure and dynamics of molecular gas in planet-forming zones: A CRIRES spectro-astrometric survey
• X-ray irradiated protoplanetary disk atmospheres II: Predictions from models in hydrostatic equilibrium
• On the gas content of transitional disks: a VLT/X-Shooter study of accretion and winds
• Molecular Hydrogen Emission from Protoplanetary Disks II. Effects of X-ray Irradiation and Dust Evolution
• The dispersal of protoplanetary discs I: A new generation of X-ray photoevaporation models
• Molecular Hydrogen Emission from Protoplanetary Disks
• Tracing Slow Winds from T Tauri Stars via Low Velocity Forbidden Line Emission
• Radiation thermo-chemical models of protoplanetary disks II. Line diagnostics
• X-ray enabled MOCASSIN: a 3D code for photoionized media
• Kinematic links and the co-evolution of MHD winds, jets, and inner disks from a high-resolution optical [OI] survey
• Molecule survival in magnetized protostellar disk winds. I. Chemical model and first results
• A New Look at T Tauri Star Forbidden Lines: MHD Driven Winds from the Inner Disk
• Understanding the origin of the [OI] low-velocity component from T Tauri stars
• Global Simulations of Protoplanetary Disk Outflows with Coupled Non-ideal Magnetohydrodynamics and Consistent Thermochemistry
• Spatially Resolved Molecular Hydrogen Emission in the Inner 200AU Environments of Classical T Tauri Stars
• A multi-frequency ALMA characterization of substructures in the GM Aur protoplanetary disk
• Consistent dust and gas models for protoplanetary disks III. Models for selected objects from the FP7 DIANA project
• X-ray impact on the protoplanetary disks around T Tauri stars
• Consistent dust and gas models for protoplanetary disks: II. Chemical networks and rates
• Detections of Ro-Vibrational H${}_2$ Emission from the Disks of T Tauri Stars
• The unusual protoplanetary disk around the T Tauri star ET Cha
• Global Hydromagnetic Simulations of Protoplanetary Disks with Stellar Irradiation and Simplified Thermochemistry
• Radiation hydrodynamics simulations of photoevaporation of protoplanetary disks II: Metallicity dependence of UV and X-ray photoevaporation
• Hydrodynamic Photoevaporation of Protoplanetary Disks with Consistent Thermochemistry
• ALMA detection of the rotating molecular disk wind from the young star HD 163296
• Blueshifted [OI] lines from protoplanetary discs: the smoking gun of X-ray photoevaporation
• Radiation Hydrodynamics Simulations of Photoevaporation of Protoplanetary Disks by Ultra Violet Radiation: Metallicity Dependence
• Suppression of HD-cooling in protogalactic gas clouds by Lyman-Werner radiation
• Scanning disk rings and winds in CO at 0.01-10 au: a high-resolution $M$-band spectroscopy survey with IRTF-iSHELL
• Disk Dispersal: Theoretical Understanding and Observational Constraints
• The interpretation of protoplanetary disc wind diagnostic lines from X-ray photoevaporation and analytical MHD models
• Origin of the wide-angle hot H2 in DG Tauri: New insight from SINFONI spectro-imaging
• FUV and X-ray irradiated protoplanetary disks: a grid of models I. The disk structure
• Quiescent H2 Emission From Pre-Main Sequence Stars in Chamaeleon I
• Evidence of a past disc-disc encounter: HV and DO Tau
• GIARPS High-resolution Observations of T Tauri stars (GHOsT). II. Connecting atomic and molecular winds in protoplanetary disks
• Modeling the delivery of dust from discs to ionized winds
• Evidence for an MHD disk wind via optical forbidden line spectro-astrometry
• On the origin of [Ne II] emission in young stars: mid-infrared and optical observations with the Very Large Telescope
• Radiation thermo-chemical models of protoplanetary disks. Grain and polycyclic aromatic hydrocarbon charging
• X-ray ionization rates in protoplanetary discs
• Dust entrainment in photoevaporative winds: The impact of X-rays
• ALMA detects a radial disk wind in DG Tau
• Dust entrainment in magnetically and thermally driven disk winds
• Dust delivery and entrainment in photoevaporative winds
• Disk Evolution Study Through Imaging of Nearby Young Stars (DESTINYS): A Panchromatic View of DO Tau's Complex Kilo-au Environment
• A Search for Spatially Resolved Infrared Ro-Vibrational Molecular Hydrogen Emission from the Disks of Young Stars
• Disk Evolution Study Through Imaging of Nearby Young Stars (DESTINYS): A close low mass companion to ET Cha
• The importance of X-ray frequency in driving photoevaporative winds
• Dynamical effects of the radiative stellar feedback on the H I-to-H2 transition
• Probing Protoplanetary Disk Winds with C II Absorption
• Mid-infrared interferometric variability of DG Tau: implications for the inner-disk structure
• Dust entrainment in photoevaporative winds: Densities and imaging
• Modelling thermochemical processes in protoplanetary disks I: numerical methods

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