Accretion through the inner hole of transitional disks: what happens to the dust?
Accretion through the inner hole of transitional disks: what happens to the dust?
复制标题
通过过渡盘内孔的吸积：灰尘会发生什么？
DOI：
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发表时间：
2011
期刊：
影响因子：
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通讯作者：
C. Dullemond
中科院分区：
文献类型：
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作者：
C. Dominik;C. Dullemond;C. Dullemond
本文研究了辐射压力对具有大内孔的过渡盘内缘尘埃的影响。特别是，我们评估辐射压力是否可以负责保持内孔无尘，同时允许气体吸积进行。这已经在Chiang和Murray-Clay的论文（2007，Nature Phys.，3，604），他们解释了这些洞的形成是由于X射线引发的洞外盘边缘最内层的吸积而导致的由内而外的疏散。我们表明，辐射压力显然是无法阻止灰尘流入孔，因为灰尘堆积和光学深度的影响，也因为粘性混合。需要找到其他机制来解释吸积存在的不透明洞的持久性，我们推测可能的解决方案。
We study the effect of radiation pressure on the dust in the inner rim of transitional disks with large inner holes. In particular, we evaluate whether radiation pressure can be responsible for keeping the inner holes dust-free, while allowing gas accretion to proceed. This has been proposed in a paper by Chiang & Murray-Clay (2007, Nature Phys., 3, 604) who explain the formation of these holes as an inside-out evacuation due to X-ray-triggered accretion of the innermost layer of the disk rim outside of the hole. We show that radiation pressure is clearly incapable of stopping dust from flowing into the hole because of dust pile-up and optical depth effects, and also because of viscous mixing. Other mechanisms need to be found to explain the persistence of the opacity hole in the presence of accretion, and we speculate on possible solutions.