The Disk Substructures at High Angular Resolution Project (DSHARP): I. Motivation, Sample, Calibration, and Overview
Sean M. Andrews, Jane Huang, Laura M. Pérez, Andrea Isella, Cornelis P. Dullemond, Nicolás T. Kurtovic, Viviana V. Guzmán, John M. Carpenter, David J. Wilner, S… 展开作者
Sean M. Andrews, Jane Huang, Laura M. Pérez, Andrea Isella, Cornelis P. Dullemond, Nicolás T. Kurtovic, Viviana V. Guzmán, John M. Carpenter, David J. Wilner, Shangjia Zhang, Zhaohuan Zhu, Tilman Birnstiel, Xue-Ning Bai, Myriam Benisty, A. Meredith Hughes, Karin I. Öberg, Luca Ricci
我们介绍的磁盘子结构在高角分辨率项目（DSHARP），与阿塔卡玛大型毫米/亚毫米阵列（ALMA）进行的最初的大型计划之一。DSHARP的主要目标是找到和表征的子结构的固体粒子的空间分布的样本附近的20个原行星盘，使用非常高的分辨率（0.035弧秒，或5 AU FWHM）的观测其240 GHz（1.25 mm）的连续辐射。这些数据提供了第一个均匀的外观在磁盘中的小尺度功能，直接相关的行星形成过程中，量化其患病率，形态，空间尺度，间距，对称性和振幅，为目标与各种磁盘和恒星主机属性。我们发现，这些子结构是无处不在的，在这个样本的大，明亮的磁盘。它们最常表现为同心的、狭窄的发射环和耗尽的间隙，尽管在某些情况下也存在大规模的螺旋图案和小的弧形方位角不对称。这些子结构被发现在一个广泛的磁盘半径（从几个AU到超过100 AU），通常是紧凑的（$<$ 10 AU），并显示出广泛的振幅（亮度对比）。在这里，我们讨论了该项目的动机，描述了调查设计和样本属性，详细说明了观测和数据校准，强调了一些基本结果，并提供了一个总体概述的关键结论，在一系列随附的文章中更详细地介绍。DSHARP数据--包括vibration、图像、校准脚本等--在https://almascience.org/alma-data/lp/DSHARP上发布供社区使用。
英文摘要：
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 arcsec, 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 au 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.
The Disk Substructures at High Angular Resolution Project (DSHARP) VI: Dust trapping in thin-ringed protoplanetary disks
ALMA观测到的大部分原行星盘在连续体中显示出多个定义明确且近乎完美的圆环，在许多情况下具有显著的峰谷对比度。DSHARP活动表明，这些环中有几个在径向范围内非常狭窄。在本文中，我们测试的假设，这些尘埃环是由尘埃捕获在径向压力颠簸，如果得到证实，把约束的物理尘埃捕获机制。我们在1D模型分析这个过程，假设轴对称。通过与观测数据的比较，我们发现所有的星环都与尘埃捕获相一致。基于一个合理的尘埃温度模型，我们发现几个环比压力标度的高度更窄，为尘埃捕获提供了强有力的证据。环具有在0.2和0.5之间的范围内的峰值吸收光学深度。储存在每个环中的尘埃质量大约是地球质量的几十倍，尽管由于尘埃不透明度的不确定性，仍然存在许多模糊性。尘埃环的密度足以潜在地触发流动的不稳定性，但我们的分析无法证明这种机制实际上在起作用。然而，我们的结果表明，本文所< 5e-4 and very large grains a_grain >研究的所有环的数据都可以排除非常低的α_turb < > 0.1 cm的组合。
The Disk Substructures at High Angular Resolution Project (DSHARP): X. Multiple rings, a misaligned inner disk, and a bright arc in the disk around the T Tauri star HD 143006
The Disk Substructures at High Angular Resolution Project (DSHARP): IV. Characterizing substructures and interactions in disks around multiple star systems
The Disk Substructures at High Angular Resolution Project (DSHARP): III. Spiral Structures in the Millimeter Continuum of the Elias 27, IM Lup, and WaOph 6 Disks
Axisymmetric Modeling of DSHARP Dusty Disks: Asymmetric Structures and Inner-Disk Dispersal
College of Science, Ibaraki University（茨城大学理学部）；Tsung-Dao Lee Institute, Shanghai Jiao Tong University（上海交通大学李政道研究所）；RIKEN Cluster for Pioneering Research（理化学院先锋研究集群）；Division of Liberal Arts, Kogakuin University（工学院大学人文学部）；National Astronomical Observatory of Japan（日本国立天文台）
Multi-frequency analysis of the ALMA and VLA high resolution continuum observations of the substructured disc around CI Tau. Preference for sub-mm-sized low-porosity amorphous carbon grains
