论文标题
飓风圆盘中类似飓风的涡流的前景
The Prospects for Hurricane-like Vortices in Protoplanetary Disks
论文作者
论文摘要
当冰颗粒表面上的冰颗粒升华时，它会在周围的流量中增加其潜水热量。利用地球上热带气旋提供的类比，我们调查了这种能源是否足以维持或放大反流行磁盘涡旋，否则否则会成为粘性散发的受害者。通过探索性二维模拟支持的分析处理表明，即使是谦虚饱和的流也可以延长涡流的寿命，可能在某种程度上足以帮助颗粒捕获和地球形成。我们希望，如果湍流运动将气体包裹从热力学平衡中取代与尘埃中间平面，那么这种机制的最佳条件将在磁盘的水冰线附近发现。
When ice on the surface of dust grains in protoplanetary disk sublimates, it adds its latent heat of water sublimation to the surrounding flow. Drawing on the analogy provided by tropical cyclones on Earth, we investigate if this energy source is sufficient to sustain or magnify anticyclonic disk vortices that would otherwise fall victim to viscous dissipation. An analytical treatment, supported by exploratory two-dimensional simulations, suggests that even modestly under-saturated flows can extend the lifetime of vortices, potentially to a degree sufficient to aid particle trapping and planetesimal formation. We expect the best conditions for this mechanism to occur will be found near the disk's water ice line if turbulent motions displace gas parcels out of thermodynamic equilibrium with the dust mid-plane.
