david kirsh ralph pudritz iau 276 torino 2010 planetesimal formation in turbulent circumstellar...
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DAVID KIRSH RALPH PUDRITZ
IAU 276 TORINO 2010
Planetesimal Formation in Turbulent Circumstellar
Disks
Planetesimal Formation
Planetesimals can’t grow from dust to protoplanet simply by snowballing through the disk Fall into the central star Fragment rather than stick
Rocks and dust can be gathered in turbulent clumps in the disk gas
If enough are gathered, they can collapse under their own gravity to create large planetesimals
Johansen, A., Oishi, J. S., Mac Low, M.-M., Klahr, H., Henning, T., & Youdin, A. 2007a, Nature, 448, 1022
Simulation
FLASH adaptive mesh refinement code with active particles Global simulations of the inner disk, torus of particles
embedded
Particle settling
First stage is the settling of particles down to the midplane
Particles differentiate
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