exoALMA III: Line-intensity Modeling and System Property Extraction from Protoplanetary Disks

Abstract

The ALMA large program exoALMA offers a unique window into the three-dimensional physical and dynamical properties of 15 circumstellar disks where planets may be actively forming. Here, we present an analysis methodology to map the gas disk structure and substructure encoded in 12CO, 13CO, and CS line emission from our targets. To model and characterize the disk structure probed by optically thin species, such as CS and, in some cases, 13CO, we introduce a composite line profile kernel that accounts for increased intensities caused by the projected overlap between the disk's front and back side emission. Our workflow, built on the Discminer modelling framework, incorporates an improved iterative two-component fitting method for inclined sources ($i>40^{\circ }$), to mitigate the impact of the disk backside on the extraction of velocity maps. Also, we report best-fit parameters for the Keplerian stellar masses, as well as inclinations, position angles, systemic velocities, rotation direction, and emission surfaces of the disks in our sample.

arXiv commentThis paper is part of the exoALMA Focus Issue of The Astrophysical Journal Letters

References in corpus (30)

• Array Programming with NumPy
• emcee: The MCMC Hammer
• scikit-image: Image processing in Python
• The Astropy Project: Sustaining and Growing a Community-oriented Open-source Project and the Latest Major Release (v5.0) of the Core Package
• CASA, the Common Astronomy Software Applications for Radio Astronomy
• A Kinematical Detection of Two Embedded Jupiter Mass Planets in HD 163296
• CMasher: Scientific colormaps for making accessible, informative and 'cmashing' plots
• Kinematic evidence for an embedded protoplanet in a circumstellar disc
• Direct mapping of the temperature and velocity gradients in discs. Imaging the vertical CO snow line around IM Lupi
• Kinematic detection of a planet carving a gap in a protoplanetary disc
• The Disk Substructures at High Angular Resolution Project (DSHARP) - IX. A high definition study of the HD 163296 planet forming disk
• Opacity broadening and interpretation of suprathermal CO linewidths: Macroscopic Turbulence and Tangled Molecular Clouds
• 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
• The Flying Saucer: Tomography of the thermal and density gas structure of an edge-on protoplanetary disk
• The Disc Miner I: A statistical framework to detect and quantify kinematical perturbations driven by young planets in discs
• Midplane temperature and outer edge of the protoplanetary disk around HD 163296
• The Disc Miner II: Revealing Gas substructures and Kinematic signatures from Planet-disc interaction through line profile analysis
• Observational Signatures of Tightly Wound Spirals Driven by Buoyancy Resonances in Protoplanetary Disks
• Mapping the Complex Kinematic Substructure in the TW Hya Disk
• The theory of kinks -- I. A semi-analytic model of velocity perturbations due to planet-disc interaction
• exoALMA V: Gaseous Emission Surfaces and Temperature Structures
• A kinematically detected planet candidate in a transition disk
• exoALMA IV: Substructures, Asymmetries, and the Faint Outer Disk in Continuum Emission
• exoALMA XII: Weighing and sizing exoALMA disks with rotation curve modelling
• Constraining Protoplanetary Disk Accretion and Young Planets Using ALMA Kinematic Observations
• Observational Signatures of Planets in Protoplanetary Disks: Planet-Induced Line Broadening in Gaps
• Mapping the Planetary Wake in HD 163296 with Kinematics
• exoALMA. VI. Rotating under Pressure: Rotation curves, azimuthal velocity substructures, and pressure variations
• exoALMA XV: Interpreting the height of CO emission layer
• exoALMA. VIII. Probabilistic Moment Maps and Data Products using Non-parametric Linear Models

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• exoALMA XII: Weighing and sizing exoALMA disks with rotation curve modelling
• exoALMA. VI. Rotating under Pressure: Rotation curves, azimuthal velocity substructures, and pressure variations
• exoALMA XV: Interpreting the height of CO emission layer
• exoALMA. XVII. Characterizing the Gas Dynamics around Dust Asymmetries
• exoALMA. VIII. Probabilistic Moment Maps and Data Products using Non-parametric Linear Models
• Circumplanetary Disk Candidate in the Disk of HD 163296 Traced by Localized Emission from Simple Organics
• The Circumbinary Disk of HD 34700A: I. CO gas kinematics indicate spirals, infall, and vortex motions
• The ALMA survey to Resolve exoKuiper belt Substructures (ARKS) VII: Optically thick gas with broad CO gaussian local line profiles in the HD 121617 disc
• exoALMA XXI: The Morphology and Dynamics of Vertical Flows
• exoALMA XIX: Confirmation of Non-thermal Line Broadening in the DM Tau Protoplanetary Disk
• exoALMA XX: Tomographic Detection of Embedded Planets in Protoplanetary Disks
• exoALMA XXIII. Estimating Disk and Planet Properties from Dust Morphologies with DBNets2.0
• Gravitational instability in planet-forming discs
• Reading between the rings: observed dust ring properties as probes of planet masses
• The Circumbinary Disc of HD 34700A II. Analysis of a strong dust asymmetry