Global magnetohydrodynamic simulations of the inner regions of protoplanetary discs. I. Zero-net flux regime

Abstract

The inner regions of protoplanetary discs, which encompass the putative habitable zone, are dynamically complex, featuring a well-ionised, turbulent active inner region and a poorly ionised `dead' outer region. In this first paper, we investigate a base-level model of the magnetohydrodynamic processes around the interface between these two regions, using five three-dimensional global magnetohydrodynamic simulations in the zero-net flux regime. We employ physically motivated profiles for Ohmic resistivity and ambipolar diffusion, alongside a simplified thermodynamic model comprising a cool disc and hot corona. Our results show that, first, large-scale coherent poloidal magnetic field loops form in the magnetorotational instability active region. These loops lead to the accumulation of tightly wound magnetic flux at the disc-corona temperature transition, driving strong, localised accretion flows in the surface layers of the active region. Second, an axisymmetric pressure maximum, extending across multiple disc scale heights, develops as a result of outward mass transport from the active region. This, in turn, triggers the Rossby wave instability and leads to the development of anticyclonic vortices. Third, the dead zone develops magnetic field with a distinct morphology, likely resulting from the outward diffusion of the large-scale poloidal loops in the active zone. This self-consistently generated field exhibits a vertical structure that can drive accretion in the inner dead zone via a weak magnetic-pressure wind. In the second paper in the series, we extend this work to the vertical-net flux regime, where global magnetic flux transport and magnetically driven outflows become dynamically significant.

19 pages, 22 figures

References in corpus (52)

• Gaps, Rings, and Non-Axisymmetric Structures in Protoplanetary Disks - From Simulations to ALMA Observations
• Global simulations of protoplanetary disks with ohmic resistivity and ambipolar diffusion
• The structure of protoplanetary discs around evolving young stars
• Global Simulations of the Inner Regions of Protoplanetary Disks with Comprehensive Disk Microphysics
• Planet formation bursts at the borders of the dead zone in 2D numerical simulations of circumstellar disks
• Dead Zone Accretion Flows in Protostellar Disks
• Global MHD simulations of stratified and turbulent protoplanetary discs. I. Model properties
• Advection of Magnetic Fields in Accretion Disks: Not So Difficult After All
• On the Stability of Elliptical Vortices in Accretion Discs
• 3D Radiation Non-ideal Magnetohydrodynamical Simulations Of The Inner Rim In Protoplanetary Disks
• Assembling the Building Blocks of Giant Planets around Intermediate Mass Stars
• Hall-effect Mediated Magnetic Flux Transport in Protoplanetary Disks
• ALMA reveals a large structured disk and nested rotating outflows in DG Tau B
• New composite models of partially ionized protoplanetary disks
• A systematic description of wind-driven protoplanetary discs
• Global Hydromagnetic Simulations of Protoplanetary Disks with Stellar Irradiation and Simplified Thermochemistry
• Gaia 17bpi: An FU Ori Type Outburst
• Magnetic outflows from turbulent accretion disks: I. Vertical structure & secular evolution
• Stringent limits on the magnetic field strength in the disc of TW Hya: ALMA observations of CN polarisation
• Global evolution of the magnetic field in a thin disc and its consequences for protoplanetary systems
• Hydro-, Magnetohydro-, and Dust-Gas Dynamics of Protoplanetary Disks
• Setting the Stage for Planet Formation: Measurements and Implications of the Fundamental Disk Properties
• Grand challenges in protoplanetary disc modelling
• Gaia 18dvy: a new FUor in the Cygnus OB3 association
• JWST/NIRSpec Reveals the Nested Morphology of Disk Winds from Young Stars
• Long-Lived Dust Asymmetries at Dead Zone Edges in Protoplanetary Disks
• Magnetic torques on T Tauri stars: accreting vs. non-accreting systems
• The asymmetric inner disk of the Herbig Ae star HD 163296 in the eyes of VLTI/MATISSE: evidence for a vortex?
• Vortex cycles at the inner edges of dead zones in protoplanetary disks
• The GRAVITY Young Stellar Object survey. VII. The inner dusty disks of T Tauri stars
• Measuring protoplanetary disk gas surface density profiles with ALMA
• MRI-active inner regions of protoplanetary discs. I. A detailed model of disc structure
• IDEFIX: a versatile performance-portable Godunov code for astrophysical flows
• ALMA CN Zeeman Observations of AS 209: Limits on Magnetic Field Strength and Magnetically Driven Accretion Rate
• Do we need non-ideal magnetohydrodynamics to model protostellar discs?
• The GRAVITY Young Stellar Object Survey. VI. Mapping the variable inner disk of HD 163296 at sub-au scales
• Magnetically-activated accretion outbursts of pre-main sequence discs
• Analytic Expressions for the Inner-Rim Structure of Passively Heated Protoplanetary Disks
• On the Origin of Dust Structures in Protoplanetary Disks: Constraints from the Rossby Wave Instability
• Observing protoplanetary discs with the Square Kilometre Array -- I. Characterising pebble substructure caused by forming planets
• Dynamics Near the Inner Dead-Zone Edges in a Proprotoplanetary Disk
• Variability of the inner dead zone edge in 2D radiation hydrodynamic simulations
• On the local stability of vortices in differentially rotating discs
• Observationally derived magnetic field strength and 3D components in the HD 142527 disk
• Local models of two-temperature accretion disc coronae. I. Structure, outflows, and energetics
• Global 3-D Simulations of Magnetospheric Accretion: II. Hot Spots, Equilibrium Torque, Episodic Wind, and Midplane Outflow
• Local semi-analytic models of magnetic flux transport in protoplanetary discs
• MRI-active inner regions of protoplanetary discs. II. Dependence on dust, disc and stellar parameters
• FU Orionis disk outburst: evidence for a gravitational instability scenario triggered in a magnetically dead zone
• Ionization chemistry in the inner disc: a combined treatment of ionic and thermionic emission and arbitrary grain size distributions
• The GRAVITY young stellar object survey XIV : Investigating the magnetospheric accretion-ejection processes in S CrA N
• Probing Inner-Edge of Dead Zones in Protoplanetary Disks with ALMA and Next Generation Very Large Array

Cited by in corpus (2)

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• Global magnetohydrodynamic simulations of the inner regions of protoplanetary discs. II. Vertical-net-flux regime