Dust Dynamics in Protoplanetary Disk Winds Driven by Magneto-Rotational Turbulence: A Mechanism for Floating Dust Grains with Characteristic Sizes

Abstract

We investigate the dynamics of dust grains with various sizes in protoplanetary disk winds driven by magnetorotational turbulence, by simulating the time evolution of the dust grain distribution in the vertical direction. Small dust grains, which are well coupled to the gas, are dragged upward with the upflowing gas, while large grains remain near the midplane of a disk. Intermediate--size grains float at several scale heights from the midplane in time-averated force balance between the downward gravity and the upward gas drag. For the minimum mass solar nebula at 1 AU, dust grains with size of 20 -- 40 $\mu m$ float at 5-10 scale heights from the midplane. Considering the dependence on the distance from the central star, smaller-size grains remain only in an outer region of the disk, while larger-size grains are distributed in a broader region. We also discuss the implication of our result to the observation of dusty material around young stellar objects.

8 pages, 6 figures, Submitted to ApJ

References in corpus (10)

• Particle Stirring in Turbulent Gas Disks: Including Orbital Oscillations
• Photoevaporation of protoplanetary discs II: evolutionary models and observable properties
• Global simulations of protoplanetary disks with ohmic resistivity and ambipolar diffusion
• A Spitzer view of protoplanetary disks in the gamma Velorum cluster
• X-ray irradiated protoplanetary disk atmospheres I: Predicted emission line spectrum and photoevaporation
• X-Shooter spectroscopy of young stellar objects: V - Slow winds in T Tauri stars
• Dust accretion onto high-mass planets
• Surface Geometry of Protoplanetary Disks Inferred From Near-Infrared Imaging Polarimetry
• Disk Dissipation Timescale of Pre-main Sequence Stars in Taurus
• Rapid Dissipation of Protoplanetary Disks in Ophiuchus

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