Abstract—

The paper considers a three-dimensional gas-dynamic model of a protoplanetary disk that revolves around a gravitating center. The dynamics of small perturbations in a rotational shear flow are modeled. The development of the initial azimuthal perturbations of the rotation speed leads to the formation of spiral density arms, while self-gravity increases its local maxima and creates gravitational instability as well as disk fragmentation. The obtained results are of interest for the theory explaining the formation of protoplanetary systems.

中文翻译：

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原行星盘水动力和重力不稳定性的三维数值模拟

摘要-

该论文考虑了围绕引力中心旋转的原行星盘的三维气体动力学模型。对旋转剪切流中的小扰动的动力学进行了建模。旋转速度的初始方位角扰动的发展导致螺旋密度臂的形成，而自引力增加了其局部最大值并产生引力不稳定性以及磁盘碎片。获得的结果对于解释原行星系统形成的理论很有意义。