The Disk Substructures at High Angular Resolution Project (DSHARP). I. Motivation, Sample, Calibration, and Overview - INSU - Institut national des sciences de l'Univers Access content directly
Journal Articles The Astrophysical journal letters Year : 2018

The Disk Substructures at High Angular Resolution Project (DSHARP). I. Motivation, Sample, Calibration, and Overview

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

Abstract

We introduce the Disk Substructures at High Angular Resolution Project (DSHARP), one of the initial Large Programs conducted with the Atacama Large Millimeter/submillimeter Array (ALMA). The primary goal of DSHARP is to find and characterize substructures in the spatial distributions of solid particles for a sample of 20 nearby protoplanetary disks, using very high resolution (∼0.″035, or 5 au, FWHM) observations of their 240 GHz (1.25 mm) continuum emission. These data provide a first homogeneous look at the small-scale features in disks that are directly relevant to the planet formation process, quantifying their prevalence, morphologies, spatial scales, spacings, symmetry, and amplitudes, for targets with a variety of disk and stellar host properties. We find that these substructures are ubiquitous in this sample of large, bright disks. They are most frequently manifested as concentric, narrow emission rings and depleted gaps, although large-scale spiral patterns and small arc-shaped azimuthal asymmetries are also present in some cases. These substructures are found at a wide range of disk radii (from a few astronomical units to more than 100 au), are usually compact (≲10 au), and show a wide range of amplitudes (brightness contrasts). Here we discuss the motivation for the project, describe the survey design and the sample properties, detail the observations and data calibration, highlight some basic results, and provide a general overview of the key conclusions that are presented in more detail in a series of accompanying articles. The DSHARP data—including visibilities, images, calibration scripts, and more—are released for community use at https://almascience.org/alma-data/lp/DSHARP.

Dates and versions

insu-03635024 , version 1 (08-04-2022)

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Cite

Sean M. Andrews, Jane Huang, Laura M. Pérez, Andrea Isella, Cornelis P. Dullemond, et al.. The Disk Substructures at High Angular Resolution Project (DSHARP). I. Motivation, Sample, Calibration, and Overview. The Astrophysical journal letters, 2018, 869, ⟨10.3847/2041-8213/aaf741⟩. ⟨insu-03635024⟩
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