The Disk Substructures at High Angular Resolution Project (DSHARP). IX. A High-definition Study of the HD 163296 Planet-forming Disk
The Disk Substructures at High Angular Resolution Project (DSHARP). IX. A High-definition Study of the HD 163296 Planet-forming Disk
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DOI：
10.3847/2041-8213/aaf747
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发表时间：
2018-12
期刊：
影响因子：
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通讯作者：
A. Isella;Jane Huang;S. Andrews;C. Dullemond;T. Birnstiel;Shangjia Zhang;Zhaohuan Zhu;V. Guzm'an-V.-Guzm'a
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文献类型：
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作者：
A. Isella;Jane Huang;S. Andrews;C. Dullemond;T. Birnstiel;Shangjia Zhang;Zhaohuan Zhu;V. Guzm'an-V.-Guzm'a
阿塔卡马大型毫米/亚毫米阵列对原行星盘的观测由高角分辨率项目的盘子结构获得，解决了小至3个天文单位的角尺度上的尘埃和气体排放，提供了行星形成环境的前所未有的详细视图。在这封信中，我们提出和讨论的HD 163296原行星盘，成像的1.25毫米的尘埃连续体和12 CO J = 2-1旋转线发射的空间分辨率分别为4和10 Au的意见。连续观测解决了之前发现的半径为68和100的尘埃环的问题，并使我们能够描述其特征。它们还揭示了新的小尺度结构，如10 Au的暗隙，15 Au的亮环，半径为55 Au的尘埃新月，以及几个较暗的方位角不对称。CO和尘埃排放的观测提供了有关盘的垂直结构的信息，并使我们能够直接限制尘埃消光光学厚度的尘埃环。此外，观测到的尘埃连续辐射的不对称性证实了HD 163296盘的复杂结构是与尚未发现的行星引力相互作用的结果的假设。
The Atacama Large Millimeter/submillimeter Array observations of protoplanetary disks acquired by the Disk Substructure at High Angular Resolution Project resolve the dust and gas emission on angular scales as small as 3 astronomical units, offering an unprecedented detailed view of the environment where planets form. In this Letter, we present and discuss observations of the HD 163296 protoplanetary disk that imaged the 1.25 mm dust continuum and 12CO J = 2–1 rotational line emission at a spatial resolution of 4 and 10 au, respectively. The continuum observations resolve and allow us to characterize the previously discovered dust rings at radii of 68 and 100. They also reveal new small-scale structures, such as a dark gap at 10 au, a bright ring at 15 au, a dust crescent at a radius of 55 au, and several fainter azimuthal asymmetries. The observations of the CO and dust emission provide information about the vertical structure of the disk and allow us to directly constrain the dust extinction optical depth at the dust rings. Furthermore, the observed asymmetries in the dust continuum emission corroborate the hypothesis that the complex structure of the HD 163296 disk is the result of the gravitational interaction with yet-unseen planets.