论文标题
在尘土飞碟中流式不稳定性的频道
Channels for streaming instability in dusty discs
论文作者
论文摘要
流媒体不稳定性是一个特权通道，可以弥合尘埃晶粒的碰撞生长与由重力触发的行星形成之间的差距。人们认为这种不稳定性是通过其长期增长的世俗模式发展而发展的，在真实的光盘中可能不容易发展。我们通过重新审查其扰动分析来解决这一点。关于Stokes数字的三阶扩展揭示了到目前为止看起来过多的重要特征。世俗模式可以稳定。高环境可能是不稳定的，对粘度具有更大的抵抗力，并通过格林的功能分析确定为行星形成的有前途的通道。
Streaming instability is a privileged channel to bridge the gap between collisional growth of dust grains and planetesimal formation triggered by gravity. This instability is thought to develop through its secular mode, which is long-time growing and may not develop easily in real discs. We address this point by revisiting its perturbation analysis. A third-order expansion with respect to the Stokes number reveals important features over-looked so far. The secular mode can be stable. Epicycles can be unstable, more resistant to viscosity and are identified by Green's function analysis as promising channels for planetesimals formation.
