Small-scale clustering of nano-dust grains in turbulent interstellar molecular clouds

摘要

It is well established that large grains will decouple from a turbulent gas flow, while small grains will tend to trace the motion of the gas. Small grains may still cluster on scales smaller than those typical for a turbulent flow due to centrifuging of particles away from vortex cores and accumulation of particles in convergence zones (a.k.a. preferential concentration). However, this has not yet been demonstrated for compressible flows.