The Disk Substructures at High Angular Resolution Project (DSHARP). VI. Dust Trapping in Thin-ringed Protoplanetary Disks - CNRS - Centre national de la recherche scientifique Accéder directement au contenu
Article Dans Une Revue The Astrophysical journal letters Année : 2018

The Disk Substructures at High Angular Resolution Project (DSHARP). VI. Dust Trapping in Thin-ringed Protoplanetary Disks

Cornelis P. Dullemond
  • Fonction : Auteur
Tilman Birnstiel
  • Fonction : Auteur
Jane Huang
  • Fonction : Auteur
Nicolás T. Kurtovic
  • Fonction : Auteur
Sean M. Andrews
  • Fonction : Auteur
Viviana V. Guzmán
  • Fonction : Auteur
Laura M. Pérez
  • Fonction : Auteur
Andrea Isella
Zhaohuan Zhu
  • Fonction : Auteur
David J. Wilner
  • Fonction : Auteur
Xue-Ning Bai
  • Fonction : Auteur
John M. Carpenter
  • Fonction : Auteur
Shangjia Zhang
  • Fonction : Auteur
Luca Ricci
  • Fonction : Auteur

Résumé

A large fraction of the protoplanetary disks observed with ALMA display multiple well-defined and nearly perfectly circular rings in the continuum, in many cases with substantial peak-to-valley contrast. The DSHARP campaign shows that several of these rings are very narrow in radial extent. In this Letter we test the hypothesis that these dust rings are caused by dust trapping in radial pressure bumps, and if confirmed, put constraints on the physics of the dust trapping mechanism. We model this process analytically in 1D, assuming axisymmetry. By comparing this model to the data, we find that all rings are consistent with dust trapping. Based on a plausible model of the dust temperature we find that several rings are narrower than the pressure scale height, providing strong evidence for dust trapping. The rings have peak absorption optical depth in the range between 0.2 and 0.5. The dust masses stored in each of these rings is of the order of tens of Earth masses, though much ambiguity remains due to the uncertainty of the dust opacities. The dust rings are dense enough to potentially trigger the streaming instability, but our analysis cannot give proof of this mechanism actually operating. Our results show, however, that the combination of very low {α }turb}\ll 5× {10}-4 and very large grains {a}grain}\gg 0.1 {cm} can be excluded by the data for all the rings studied in this Letter.

Dates et versions

insu-03635019 , version 1 (08-04-2022)

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Citer

Cornelis P. Dullemond, Tilman Birnstiel, Jane Huang, Nicolás T. Kurtovic, Sean M. Andrews, et al.. The Disk Substructures at High Angular Resolution Project (DSHARP). VI. Dust Trapping in Thin-ringed Protoplanetary Disks. The Astrophysical journal letters, 2018, 869, ⟨10.3847/2041-8213/aaf742⟩. ⟨insu-03635019⟩
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