Nonlinear Evolution of the Resonant Drag Instability in Magnetized Gas

Abstract

We investigate, for the first time, the nonlinear evolution of the magnetized "resonant drag instabilities" (RDIs). We explore magnetohydrodynamic (MHD) simulations of gas mixed with (uniform) dust grains subject to Lorentz and drag forces, using the GIZMO code. The magnetized RDIs exhibit fundamentally different behaviour than the purely acoustic RDIs. The dust organizes into coherent structures and the system exhibits strong dust-gas separation. In the linear and early nonlinear regime, the growth rates agree with linear theory and the dust self-organizes into two-dimensional planes or "sheets." Eventually the gas develops fully nonlinear, saturated Alfvénic and compressible fast-mode turbulence, which fills the under-dense regions with a small amount of dust, and drives a dynamo which saturates at equipartition of kinetic and magnetic energy. The dust density fluctuations exhibit significant non-Gaussianity, and the power spectrum is strongly weighted towards the largest (box-scale) modes. The saturation level can be understood via quasi-linear theory, as the forcing and energy input via the instabilities becomes comparable to saturated tension forces and dissipation in turbulence. The magnetized simulation presented here is just one case; it is likely that the magnetic RDIs can take many forms in different parts of parameter space.

arXiv comment8 pages, 8 figures, submitted to MNRAS

References in corpus (24)

• Rapid planetesimal formation in turbulent circumstellar discs
• Streaming Instabilities in Protoplanetary Disks
• The Interstellar Environment of our Galaxy
• Astrophysical gyrokinetics: kinetic and fluid turbulent cascades in magnetized weakly collisional plasmas
• Compressible Magnetohydrodynamic Turbulence: mode coupling, scaling relations, anisotropy, new regime and astrophysical implications
• Photoelectric Emission from Interstellar Dust: Grain Charging and Gas Heating
• Dynamics of Protoplanetary Disks
• Forming Planetesimals in Solar and Extrasolar Nebulae
• Particle Clumping and Planetesimal Formation Depend Strongly on Metallicity
• Accurate, Meshless Methods for Magneto-Hydrodynamics
• The Effect of the Radial Pressure Gradient in Protoplanetary Disks on Planetesimal Formation
• Feedback first: the surprisingly weak effects of magnetic fields, viscosity, conduction, and metal diffusion on galaxy formation
• Resonant Drag Instabilities in protoplanetary disks: the streaming instability and new, faster-growing instabilities
• Anisotropic Diffusion in Mesh-Free Numerical Magnetohydrodynamics
• A Constrained-Gradient Method to Control Divergence Errors in Numerical MHD
• Turbulent Clustering of Protoplanetary Dust and Planetesimal Formation
• The Fundamentally Different Dynamics of Dust and Gas in Molecular Clouds
• Resonant drag instability of grains streaming in fluids
• 16 Years of Ulysses Interstellar Dust Measurements in the Solar System: I. Mass Distribution and Gas-to-Dust Mass Ratio
• Ubiquitous Instabilities of Dust Moving in Magnetized Gas
• The Dynamics of Charged Dust in Magnetized Molecular Clouds
• The Resonant Drag Instability (RDI): Acoustic Modes
• Kinematics of solid particles in a turbulent protoplanetary disc
• Stellar feedback strongly alters the amplification and morphology of galactic magnetic fields

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