Wavelike nature of the vertical shear instability in global protoplanetary disks

Abstract

The vertical shear instability (VSI) is a robust phenomenon in irradiated protoplanetary disks (PPDs). The majority of previous numerical simulations have focused on the turbulent properties of its saturated state. However, the saturation of the VSI manifests as large-scale coherent radially travelling inertial waves. In this paper, we study inertial-wave-disk interactions and their impact on VSI saturation. Inertial-wave linear theory is developed and applied to a representative global 2D simulation using the Athena++ code. It is found that the VSI saturates by separating the disk into several radial wave zones roughly demarcated by corotation resonances (turning points); this structure also manifests in modest radial variations in the vertical turbulence strength. Future numerical work should employ large radial domains to accommodate this radial structure of the VSI, while concurrently adopting sufficiently fine resolutions to resolve the parametric instability that attacks the saturated VSI inertial waves.

8 pages, 6 figures, accepted for publication in MNRAS

References in corpus (15)

• The Athena++ Adaptive Mesh Refinement Framework: Design and Magnetohydrodynamic Solvers
• Vertical shear instability in accretion disc models with radiation transport
• Radiation Hydrodynamical Turbulence In Protoplanetary Disks: Numerical Models and Observational Constraints
• Gas and dust dynamics in starlight-heated protoplanetary disks
• On the vertical-shear instability in astrophysical discs
• Global Three-Dimensional Simulations of Outer Protoplanetary Disks with Ambipolar Diffusion
• On the coexistence of the streaming instability and the vertical shear instability in protoplanetary disks
• Global Simulations of the Vertical Shear Instability with Non-ideal Magnetohydrodynamical Effects
• High Resolution Parameter Study of the Vertical Shear Instability
• Local models of astrophysical discs
• The Sandwich Mode for Vertical Shear Instability in Protoplanetary Disks
• Hydrodynamical simulations of protoplanetary disks including irradiation of stellar photons. I. Resolution study for Vertical Shear Instability (VSI)
• The vertical shear instability in poorly ionised, magnetized protoplanetary discs
• The saturation of the VSI in protoplanetary disks via parametric instability
• On the Vertical Shear Instability in Magnetized Protoplanetary Disks

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• Vertical shear instability in two-moment radiation-hydrodynamical simulations of irradiated protoplanetary disks I. Angular momentum transport and turbulent heating
• Hydrodynamic turbulence in disks with embedded planets
• How to form compact & other longer-lived planet-induced vortices: VSI, planet migration, or re-triggers, but not feedback
• Rossby wave instability in weakly ionized protoplanetary disks. II. radial B-fields
• Developing a Non-Newtonian Fluid Model for Dust, for Application to Astrophysical Flows
• Linear bending wave propagation in laminar and turbulent discs