Nine Localized Deviations from Keplerian Rotation in the DSHARP Circumstellar Disks: Kinematic Evidence for Protoplanets Carving the Gaps
Nine Localized Deviations from Keplerian Rotation in the DSHARP Circumstellar Disks: Kinematic Evidence for Protoplanets Carving the Gaps
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DOI：
10.3847/2041-8213/ab6dda
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发表时间：
2020-01
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通讯作者：
C. Pinte;Daniel J. Price;F. Menard;G. Duchêne;V. Christiaens;S. Andrews;Jane Huang;Tracey Hill;G. V. D. Plas;L. M. Pérez;A. Isella;Y. Boehler;W. Dent;D. Mentiplay;R. Loomis
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作者：
C. Pinte;Daniel J. Price;F. Menard;G. Duchêne;V. Christiaens;S. Andrews;Jane Huang;Tracey Hill;G. V. D. Plas;L. M. Pérez;A. Isella;Y. Boehler;W. Dent;D. Mentiplay;R. Loomis
我们提供了证据表明，在DSHARP计划观测到的18个星周圆盘中，有8个存在与开普勒旋转的局部偏差，即速度“扭结”：DoAr 25、Elias 2-27、GW Lup、HD 143006、HD 163296、IM Lup、Sz 129和WaOph 6。大多数扭结在径向范围和速度上都是在一个很小的范围内被检测到的，这表明它们是行星的起源，但对于其中一些扭结，前景污染使我们无法测量它们的空间和速度范围。由于DSHARP有限的光谱分辨率和12CO J = 2−1线中的信噪比，以及云污染，扭结通常仅在一个光谱通道中检测到，并且需要确认。在没有更高的光谱分辨率数据和额外的示踪剂的情况下，最有力的原行星的间接证据是，在解投影后，我们发现所有的候选行星都位于一个间隙和/或在尘埃连续体发射中检测到的螺旋的末端。这表明阿塔卡马大型毫米/亚毫米阵列观测到的尘埃间隙和螺旋中有很大一部分是由嵌入的原行星引起的。
We present evidence for localized deviations from Keplerian rotation, i.e., velocity “kinks,” in 8 of the 18 circumstellar disks observed by the DSHARP program: DoAr 25, Elias 2–27, GW Lup, HD 143006, HD 163296, IM Lup, Sz 129, and WaOph 6. Most of the kinks are detected over a small range in both radial extent and velocity, suggesting a planetary origin, but for some of them foreground contamination prevents us from measuring their spatial and velocity extent. Because of the DSHARP limited spectral resolution and signal to noise in the 12CO J = 2−1 line, as well as cloud contamination, the kinks are usually detected in only one spectral channel, and will require confirmation. The strongest circumstantial evidence for protoplanets in the absence of higher spectral resolution data and additional tracers is that, upon deprojection, we find that all of the candidate planets lie within a gap and/or at the end of a spiral detected in dust continuum emission. This suggests that a significant fraction of the dust gaps and spirals observed by Atacama Large Millimeter/submillimeter Array in disks are caused by embedded protoplanets.