The Disk Substructures at High Angular Resolution Project (DSHARP). I. Motivation, Sample, Calibration, and Overview
By S. Andrews, Jane Huang, L. P'erez, Andrea Isella, C. Dullemond, N. Kurtovic, V. Guzm'an, J. Carpenter, D. Wilner, Shangjia Zhang and 7 more. Astrophysical Journal, 2018
757 citations recorded by the source corpus.
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.
Subfields: Astronomy and Astrophysics, Instrumentation
View Paper: https://www.semanticscholar.org/paper/400f66fb86ba0485a21ba6aa8b81dcd7f676e72c
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Citations in the corpus
- Molecules with ALMA at Planet-forming Scales (MAPS). I. Program Overview and Highlights (2021, methodology): “The disk is highly structured in millimeter continuum emission with at least 7 nested rings (Andrews et al. 2009; Fedele et al. 2018; Andrews et al. 2018; Huang et al. 2018b; Guzmán et al. 2018), some of which have been associated with ongoing planet formation (Guzmán et al. 2018; Favre et al.…”
- One Solution to the Mass Budget Problem for Planet Formation: Optically Thick Disks with Dust Scattering (2019, methodology): “This optically thin assumption seems to be supported by recent high angular resolution observations from the DSHARP ALMA survey where the measured optical depths of most DSHARP disks are less than one.”
- Hints for a Turnover at the Snow Line in the Giant Planet Occurrence Rate (2018, background): “Rings and narrow gaps are very common in disk surveys biased toward the brightest millimeter sources, with an occurrence as high as 85% from the ALMA DSHARP survey (Andrews et al. 2018; Huang et al. 2018).”
- The Disk Substructures at High Angular Resolution Project (DSHARP). II. Characteristics of Annular Substructures (2018, methodology): “Table 1 (continued) Source Feature ∆x ∆y r0 r0 Incl.”
- The Disk Substructures at High Angular Resolution Project (DSHARP). VII. The Planet–Disk Interactions Interpretation (2018, methodology): “Here, we only consider the DSHARP sample (Andrews et al. 2018).”