Distinguishing magnetized disc winds from turbulent viscosity through substructure morphology in planet-forming discs
Articolo
Data di Pubblicazione:
2023
Citazione:
Distinguishing magnetized disc winds from turbulent viscosity through substructure morphology in planet-forming discs / Y. Wu, Y.-. Chen, H. Jiang, R. Dong, E. Macias, M.-. Lin, G.P. Rosotti, V. Elbakyan. - In: MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY. - ISSN 1365-2966. - 523:2(2023), pp. 2630-2640. [10.1093/mnras/stad1553]
Abstract:
The traditional paradigm of viscosity-dominated evolution of protoplanetary discs has been recently challenged by existence
of magnetized disc winds. However, distinguishing wind-driven and turbulence-driven accretion through observations has been
difficult. In this study, we present a novel approach to identifying their separate contribution to angular momentum transport by
studying the gap and ring morphology of planet-forming discs in the ALMA continuum. We model the gap-opening process
of planets in discs with both viscous evolution and wind-driven accretion by 2D multifluid hydrodynamical simulations. Our
results show that gap-opening planets in wind-driven accreting discs generate characteristic dust substructures that differ from
those in purely viscous discs. Specifically, we demonstrate that discs where wind-driven accretion dominates the production of
substructures exhibit significant asymmetries. Based on the diverse outputs of mock images in the ALMA continuum, we roughly
divide the planet-induced features into four regimes (moderate-viscosity dominated, moderate-wind dominated, strong-wind
dominated, and inviscid). The classification of these regimes sets up a potential method to constrain the strength of magnetized
disc wind and viscosity based on the observed gap and ring morphology. We discuss the asymmetry feature in our mock images
and its potential manifestation in ALMA observations.
Tipologia IRIS:
01 - Articolo su periodico
Keywords:
planets and satellites: formation; planet–disc interactions; protoplanetary discs
Elenco autori:
Y. Wu, Y.-. Chen, H. Jiang, R. Dong, E. Macias, M.-. Lin, G.P. Rosotti, V. Elbakyan
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