标题： 通过全球湍流原行星盘中的流体不稳定性形成最初的星子？ 显示英文标题

标题： Formation of the First Planetesimals via the Streaming Instability in Globally Turbulent Protoplanetary Disks?

摘要： 通过使用太阳成分的演化原行星星云中湍流粒子增长的自洽模型，我们发现最近提出的局部金属度和斯托克斯数标准，这些标准对于流不稳定性产生重力束缚的粒子高密度区是必要的，在最初一百万年期间，整个盘中任何地方都没有达到这些标准，而在这个时期，陨石和观测证据强烈表明，第一个星子的形成以及可能的巨大行星核心吸积已经开始了。 显示英文摘要

摘要： Using self-consistent models of turbulent particle growth in an evolving protoplanetary nebula of solar composition we find that recently proposed local metallicity and Stokes number criteria necessary for the streaming instability to generate gravitationally bound particle overdensities are generally not approached anywhere in the disk during the first million years, an epoch in which meteoritic and observational evidence strongly suggests that the formation of the first planetesimals and perhaps giant planet core accretion is already occurring.