论文标题
尘土碎片在原球盘中打碎：碰撞破碎还是旋转破坏？
Dust grain shattering in protoplanetary discs: collisional fragmentation or rotational disruption?
论文作者
论文摘要
在原球盘中，将粉尘颗粒凝结成大骨料仍然知之甚少。晶粒孔隙度似乎是一种有前途的解决方案，可以使谷物生存并形成行星。此外，通常认为粉尘破碎仅来自碰撞碎片。但是，最近引入了一个新的过程，即旋转破坏。我们编写了一维代码，该代码模拟了谷物的生长和孔隙率的演变，因为它们在包括两个破碎的过程时研究了最终结果。当模拟复制观测值的圆盘模型中晶粒的演变时，我们发现与碎片和径向漂移相比，旋转破坏不可忽略不计。当湍流参数$α\ Lessim 5 \ XtenPow {-4} $（如果径向漂移足够慢时）时，破坏就会占主导地位。我们表明，破坏在谷物生长史上的重要性很大程度上取决于它们的拉伸强度。
In protoplanetary discs, the coagulation of dust grains into large aggregates still remains poorly understood. Grain porosity appears to be a promising solution to allow the grains to survive and form planetesimals. Furthermore, dust shattering has generally been considered to come only from collisional fragmentation; however, a new process was recently introduced, rotational disruption. We wrote a one-dimensional code that models the growth and porosity evolution of grains as they drift to study their final outcome when the two shattering processes are included. When simulating the evolution of grains in a disc model that reproduces observations, we find that rotational disruption is not negligible compared to the fragmentation and radial drift. Disruption becomes dominant when the turbulence parameter $α\lesssim 5\xtenpow{-4}$, if the radial drift is slow enough. We show that the importance of disruption in the growth history of grains strongly depends on their tensile strength.
