Protostars and Planets VI, Heidelberg, July 15-20, 2013

Poster 2K095

Modeling Injection with Structured Clouds

Goodson, Matthew (UNC-Chapel Hill)
Heitsch, Fabian (UNC-Chapel Hill)

Meteorite studies indicate that active short-lived radionuclides (SLRs) were present in the early solar system. While the source of the SLRs and the mechanism of incorporation are still debated, a common bottleneck is injecting significant amounts of SLRs into the natal cloud. We hypothesize that sub-structure in the target molecular cloud will increase injection efficiencies. We use the Athena code in both 2-D and 3-D hydrodynamics with self-gravity. We simulate the interaction of a shock wave carrying a tracer scalar with a clumpy molecular cloud. The injection efficiency is determined by the fraction of ejecta carried in the shock wave that is incorporated into collapsing cloud regions. We find 1) this simple sub-structure increases the injection efficiency in most cases, and 2) injection can occur at low ejecta speeds. We caution that resolution strongly affects the mixing, and future simulations will employ MHD, sink particles, and sub-grid viscosity.

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