WL 17: A Young Embedded Transition Disk
WL 17: A Young Embedded Transition Disk
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WL 17：年轻的嵌入式过渡盘
DOI：
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发表时间：
2017
期刊：
影响因子：
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通讯作者：
J. Eisner
中科院分区：
文献类型：
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作者：
P. Sheehan;J. Eisner
我们对蛇夫座ρ L1688分子云复合体中的一级原恒星WL 17进行了迄今为止最高空间分辨率的阿尔马观测，结果表明它的盘中心有一个12 Au的黑洞。我们认为WL 17是否实际上是一个II类磁盘被前景材料，但发现这样的模型不提供一个很好的适合宽带光谱能量分布（SED），也需要这样的高消光，它可能会出现从密集的材料接近源，如残余信封。自洽模型的磁盘嵌入在一个旋转坍缩的信封可以很好地再现阿尔马3毫米的观测和宽带SED WL 17。这表明WL 17在形成的早期阶段是一个圆盘，但即使在这个年轻的年龄，内部圆盘也已经耗尽。虽然有多种途径可以在盘中形成这样的洞，但如果这个洞是由行星形成的，那么它可能会限制行星在原行星盘中生长的时间尺度。
We present the highest spatial resolution ALMA observations to date of the Class I protostar WL 17 in the ρ Ophiuchus L1688 molecular cloud complex, which show that it has a 12 au hole in the center of its disk. We consider whether WL 17 is actually a Class II disk being extincted by foreground material, but find that such models do not provide a good fit to the broadband spectral energy distribution (SED) and also require such high extinction that it would presumably arise from dense material close to the source, such as a remnant envelope. Self-consistent models of a disk embedded in a rotating collapsing envelope can nicely reproduce both the ALMA 3 mm observations and the broadband SED of WL 17. This suggests that WL 17 is a disk in the early stages of its formation, and yet even at this young age the inner disk has been depleted. Although there are multiple pathways for such a hole to be created in a disk, if this hole was produced by the formation of planets it could place constraints on the timescale for the growth of planets in protoplanetary disks.