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). X. Multiple Rings, a Misaligned Inner Disk, and a Bright Arc in the Disk around the T Tauri star HD 143006
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DOI：
10.3847/2041-8213/aaf745
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发表时间：
2018-12
期刊：
影响因子：
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通讯作者：
L. P'erez;M. Benisty;S. Andrews;A. Isella;C. Dullemond;Jane Huang;N. Kurtovic;V. Guzm'an;
中科院分区：
文献类型：
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作者：
L. P'erez;M. Benisty;S. Andrews;A. Isella;C. Dullemond;Jane Huang;N. Kurtovic;V. Guzm'an;
我们提出了一个详细的分析新的阿塔卡马大毫米/亚毫米阵列（阿尔马）的观测磁盘周围的T-Tauri星星HD 143006，在46 mas（7.6 Au）的分辨率揭示了新的子结构，在1.25毫米的连续发射。圆盘分解成一系列同心环和间隙，环外部有一个明亮的弧形，类似于漩涡的流体动力学模拟和连接两个最里面的环的桥状特征。虽然我们的12 CO观测在类似的空间分辨率没有显示出明显的子结构，他们揭示了一个内部磁盘耗尽的CO排放。从连续辐射和CO速度场我们发现，最内环比最外环和弧有更大的倾角。这是内、外盘之间小（± 8°）或中等（± 41°）错位的证据，取决于内/外盘近/远侧的具体方向。我们比较观察到的子结构在阿尔马观测最近的散射光数据，这个对象从甚大望远镜/光谱偏振高对比度系外行星研究（SPHERE）。特别是，SPHERE图像中狭窄阴影道的位置，结合压力刻度高度估计，有利于约41°的大失准。我们讨论了我们的研究结果的背景下，尘埃捕获的漩涡，行星雕刻的差距，和错位的内盘由于存在一个倾斜的同伴HD 143006。
We present a detailed analysis of new Atacama Large Millimeter/submillimeter Array (ALMA) observations of the disk around the T-Tauri star HD 143006, which at 46 mas (7.6 au) resolution reveals new substructures in the 1.25 mm continuum emission. The disk resolves into a series of concentric rings and gaps, together with a bright arc exterior to the rings that resembles hydrodynamical simulations of a vortex and a bridge-like feature connecting the two innermost rings. Although our 12CO observations at similar spatial resolution do not show obvious substructure, they reveal an inner disk depleted of CO emission. From the continuum emission and the CO velocity field we find that the innermost ring has a higher inclination than the outermost rings and the arc. This is evidence for either a small (∼8°) or moderate (∼41°) misalignment between the inner and outer disk, depending on the specific orientation of the near/far sides of the inner/outer disk. We compare the observed substructures in the ALMA observations with recent scattered-light data of this object from the Very Large Telescope/Spectro-Polarimetric High-contrast Exoplanet REsearch (SPHERE). In particular, the location of narrow shadow lanes in the SPHERE image, combined with pressure-scale height estimates, favor a large misalignment of about 41°. We discuss our findings in the context of a dust-trapping vortex, planet-carved gaps, and a misaligned inner disk due to the presence of an inclined companion to HD 143006.