Rotation curves in protoplanetary disks with thermal stratification

Abstract

In recent years the gas kinematics probed by molecular lines detected with ALMA has opened a new window to study protoplanetary disks. High spatial and spectral resolution observations have revealed the complexity of protoplanetary disk structure and correctly interpreting these data allow us to gain a better comprehension of the planet formation process. We investigate the impact of thermal stratification on the azimuthal velocity of protoplanetary disks. High resolution gas observations are showing velocity differences between CO isotopologues, which cannot be adequately explained with vertically isothermal models. The aim of this work is to determine whether a stratified model can explain this discrepancy. We analytically solve the hydrostatic equilibrium for a stratified disk and we derive the azimuthal velocity. We test the model with SPH numerical simulations and then we use it to fit for star mass, disk mass and scale radius of the sources in the MAPS sample. In particular, we use 12CO and 13CO datacubes.

16 pages, 12 figures, accepted for publication on A&A

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Cited by in corpus (18)

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• exoALMA. VI. Rotating under Pressure: Rotation curves, azimuthal velocity substructures, and pressure variations
• Mapping the merging zone of late infall in the AB Aur planet-forming system
• The ALMA Survey of Gas Evolution of PROtoplanetary Disks (AGE-PRO): III. Dust and Gas Disk Properties in the Lupus Star-forming Region
• exoALMA XV: Interpreting the height of CO emission layer
• Weighing protoplanetary discs with kinematics: physical model, method and benchmark
• exoALMA. VIII. Probabilistic Moment Maps and Data Products using Non-parametric Linear Models
• Vertical CO surfaces as a probe for protoplanetary disk mass and carbon depletion
• DBNets2.0: simulation-based inference for planet-induced dust substructures in protoplanetary discs
• Multi-frequency analysis of the ALMA and VLA high resolution continuum observations of the substructured disc around CI Tau. Preference for sub-mm-sized low-porosity amorphous carbon grains
• Strong clumping in global streaming instability simulations with a dusty fluid
• Astrometric view of companions in the inner dust cavities of protoplanetary disks
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• exoALMA XXIII. Estimating Disk and Planet Properties from Dust Morphologies with DBNets2.0
• Gravitational instability in planet-forming discs