论文标题
开阔的行星使灰尘戒指更宽
Gap-opening Planets Make Dust Rings Wider
论文作者
论文摘要
作为最常见的磁盘子结构之一，高分辨率磁盘调查的灰尘环似乎具有不同的径向宽度。最近对PDS 70和AB AUR的观察不仅显示了磁盘中的行星，而且还揭示了随附的宽尘环。我们使用三维灰尘磁盘模拟来研究悬空的行星是否负责磁盘观测中的大环宽度。我们发现，即使中间平面的尘埃与气体比接近订单统一，并且尘埃的后反应考虑了，散开的行星也可以通过行星扰动在压力凸起处捕获的灰尘环。我们表明，可以使用扩散 - 添加论理论来量化与行星相关的尘埃的拓宽效果，并在三维磁盘模型中为平衡的灰尘环宽度提供广义标准。我们还建议可以使用燃气湍流粘度$α_ {\ rm turb} $估算环宽，但要警告大约大于订单统一的Schmidt数字。
As one of the most commonly observed disk substructures, dust rings from high-resolution disk surveys appear to have different radial widths. Recent observations on PDS 70 and AB Aur reveal not only planets in the disk, but also the accompanying wide dust rings. We use three-dimensional dust-and-gas disk simulations to study whether gap-opening planets are responsible for the large ring width in disk observations. We find that gap-opening planets can widen rings of dust trapped at the pressure bump via planetary perturbations, even with the mid-plane dust-to-gas ratio approaching order unity and with the dust back-reaction accounted for. We show that the planet-related widening effect of dust rings can be quantified using diffusion-advection theory, and provide a generalized criterion for an equilibrated dust ring width in three-dimensional disk models. We also suggest that the ring width can be estimated using the gas turbulent viscosity $α_{\rm turb}$, but with cautions about the Schmidt number greater than order unity.
