Instabilities and turbulence of dust sub]disks in protoplanetary nebulae (A07)

该项目解决了一个长期存在的问题，即行星的1-1000公里大小的前体行星小行星是如何从以气体为主的整个原始行星盘中的微米大小的尘埃中形成的。回答这个问题最重要的是理解圆盘的气体和粉尘成分之间的相互作用以及粉尘颗粒之间的相互作用，特别是当粉尘聚集体具有mm-dm尺寸时，对于这种情况，向圆盘中面的沉积和其他浓缩过程可能会导致各种流体动力学不稳定性。该项目的目标是了解这些不稳定因素的发生、重要性和对行星形成的限制。

Project addresses the long-standing problem how planetesimals, the 1- 1000 km-sized precursors of the planets, form from micrometer-sized dust in an overall gas-dominated protoplanetary disk. Of utmost importance in answering this question is the understanding of the interactions between the gaseous and the dusty components of the disk and the mutual interaction between the dust particles, particularly when the dust aggregates possess mm-dm sizes, for which sedimentation towards the mid-plane of the disk and other concentration processes can lead to various hydrodynamic instabilities. The goal of project is to understand the occurrence, importance and limits of these instabilities for the formation of planetes-imals.