On the maximum grain size entrained by photoevaporative winds

Abstract

We model the behaviour of dust grains entrained by photoevaporation-driven winds from protoplanetary discs assuming a non-rotating, plane-parallel disc. We obtain an analytic expression for the maximum entrainable grain size in extreme-UV radiation-driven winds, which we demonstrate to be proportional to the mass loss rate of the disc. When compared with our hydrodynamic simulations, the model reproduces almost all of the wind properties for the gas and dust. In typical turbulent discs, the entrained grain sizes in the wind are smaller than the theoretical maximum everywhere but the inner disc due to dust settling.

11 pages, 9 figures, 1 table, 1 animation. Accepted for publication in MNRAS

References in corpus (5)

• A Submillimeter View of Circumstellar Dust Disks in $\rho$ Ophiuchus
• Global simulations of protoplanetary disks with ohmic resistivity and ambipolar diffusion
• The Impact of Dust Evolution and Photoevaporation on Disk Dispersal
• Diversity in the outcome of dust radial drift in protoplanetary discs
• The circulation of dust in protoplanetary discs and the initial conditions of planet formation

Cited by in corpus (8)

• The evolution of dust in discs influenced by external photoevaporation
• Variable dynamics in the inner disk of HD 135344B revealed with multi-epoch scattered light imaging
• Modeling the delivery of dust from discs to ionized winds
• Planet formation via pebble accretion in externally photoevaporating discs
• Dust entrainment in magnetically and thermally driven disk winds
• Dust delivery and entrainment in photoevaporative winds
• Toward a Population Synthesis of Disks and Planets I. Evolution of Dust with Entrainment in Winds and Radiation Pressure
• Dust entrainment in photoevaporative winds: Synthetic observations of transition disks