Abstract:Various physical processes that ensue within protoplanetary disks -including vertical settling of icy/rocky grains, radial drift of solids, planetesimal formation, as well as planetary accretion itself -are facilitated by hydrodynamic interactions between H/He gas and high-Z dust. The Stokes number, which quantifies the strength of dust-gas coupling, thus plays a central role in protoplanetary disk evolution, and its poor determination constitutes an important source of uncertainty within the theory of planet … Show more
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