2-D models of layered protoplanetary discs: I. The ring instability

Abstract

In this work we use the radiation hydrodynamic code TRAMP to perform a two-dimensional axially symmetric model of the layered disc. Using this model we follow the accumulation of mass in the dead zone due to the radially varying accretion rate. We found a new type of instability which causes the dead zone to split into rings. This "ring instability" works due to the positive feedback between the thickness of the dead zone and the mass accumulation rate. We give an analytical description of this instability, taking into account non-zero thickness of the dead zone and deviations from the Keplerian rotational velocity. The analytical model agrees reasonably well with results of numerical simulations. Finally, we speculate about the possible role of the ring instability in protoplanetary discs and in the formation of planets.

9 pages, 5 figures, accepted for publication in MNRAS

References in corpus (8)

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Cited by in corpus (22)

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• 2-D simulations of FU Orionis disk outbursts
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• 3D-radiation hydro simulations of disk-planet interactions: I. Numerical algorithm and test cases
• Dust settling and rings in the outer regions of protoplanetary discs subject to ambipolar diffusion
• Ring formation and dust dynamics in wind-driven protoplanetary discs: global simulations
• Dust-driven viscous ring-instability in protoplanetary disks
• Global Three-Dimensional Simulations of Outer Protoplanetary Disks with Ambipolar Diffusion
• Spontaneous ring formation in wind-emitting accretion discs
• The T Tauri star RY Tau as a case study of the inner regions of circumstellar dust disks
• Tracing the potential planet-forming regions around seven pre-main-sequence stars
• Fundamental Vibrational Transition of CO during the Outburst of EX Lupi in 2008
• The Irradiation Instability of Protoplanetary Disks
• The dynamics of inner dead-zone boundaries in protoplanetary disks
• Multiwavelength interferometric observations and modeling of circumstellar disks
• Two-dimensional modeling of density and thermal structure of dense circumstellar outflowing disks
• Two-dimensional models of layered protoplanetary discs - II. The effect of a residual viscosity in the dead zone
• The dimming of RW Auriga. Is dust accretion preceding an outburst?
• Primordial dust rings, hidden dust mass, and the first generation of planetesimals in gravitationally unstable protoplanetary disks
• Planetesimal growth in turbulent discs before the onset of gravitational instability
• Planetary nurseries: vortices formed at smooth viscosity transition