The Disk Substructures at High Angular Resolution Project (DSHARP). VI. Dust Trapping in Thin-ringed Protoplanetary Disks - Archive ouverte HAL Access content directly
Journal Articles The Astrophysical Journal Letters Year : 2018

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

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1
Cornelis P. Dullemond
  • Function : Author
Tilman Birnstiel
  • Function : Author
Jane Huang
  • Function : Author
Nicolás T. Kurtovic
  • Function : Author
Sean M. Andrews
  • Function : Author
Viviana V. Guzmán
  • Function : Author
Laura M. Pérez
  • Function : Author
Andrea Isella
Zhaohuan Zhu
  • Function : Author
David J. Wilner
  • Function : Author
Xue-Ning Bai
  • Function : Author
John M. Carpenter
  • Function : Author
Shangjia Zhang
  • Function : Author
Luca Ricci
  • Function : Author

Abstract

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 and versions

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

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Cite

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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