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arXiv 1812.04047astro-ph.SRastro-ph.EP
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高角分辨率圆盘子结构计划(DSHARP)- IX。HD 163296行星形成盘的高清晰度研究

The Disk Substructures at High Angular Resolution Project (DSHARP) - IX. A high definition study of the HD 163296 planet forming disk

Andrea Isella, Jane Huang, Sean M. Andrews, Cornelis P. Dullemond, Tilman Birnstiel, Shangjia Zhang, Zhaohuan Zhu, Viviana V. Guzmán, Laura M. Pérez, Xue-Ning B… 展开作者

Andrea Isella, Jane Huang, Sean M. Andrews, Cornelis P. Dullemond, Tilman Birnstiel, Shangjia Zhang, Zhaohuan Zhu, Viviana V. Guzmán, Laura M. Pérez, Xue-Ning Bai, Myriam Benisty, John M. Carpenter, Luca Ricci, David J. Wilner

摘要:

ALMA对高角分辨率项目(DSHARP)的盘子结构获得的原行星盘的观测解决了小至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。在这篇文章中,我们提出和讨论的HD 163296原行星盘成像的1.25毫米尘埃连续体和$^{12}$ CO J=2-1旋转线发射的空间分辨率分别为4和10 au的观测。连续体观测解决了之前发现的半径为67和100 au的尘埃环的问题,并使我们能够描述其特征。他们还揭示了新的小尺度结构,如在10金的暗隙,在15金的明亮环,在55金半径的尘埃新月,和几个微弱的方位角不对称。CO和尘埃排放的观测信息的垂直结构的磁盘,并允许我们直接限制在尘埃环的尘埃消光光学深度。此外,观测到的尘埃连续体发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。

英文摘要:

ALMA observations of protoplanetary disks acquired by the Disk Substructure at High Angular Resolution Project (DSHARP) 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 article, we present and discuss observations of the HD 163296 protoplanetary disk that imaged the 1.25 mm dust continuum and $^{12}$CO 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 67 and 100 au. 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 inform 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 to the hypothesis that the complex structure of the HD 163296 disk is the result of the gravitational interaction with yet unseen planets.

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