Scott Kenyon's Coagulation Code


	*Coagulation Code for Planet Formation*

	Coagulation is growth by collision and merger Statistical approach to inelastic collisions Fragmentation algorithm for collision outcomes Fokker-Planck approach to elastic collisions Coagulation codes have several advantages Essential for 10¹⁵ or more planetesimals Calculate evolution of small planets accurately Calculate collisional cascade Coagulation codes also have some disadvantages Fail when most of the mass in a few large objects Cannot predict final mass of planet Cannot model formation of gas giant planets Multiannulus particle-in-a-box method Treats planetesimals as statistical ensemble Particles in all annuli interact Fragmentation + Gas drag + Poynting-Robertson drag Code is parallel to run on modern supercomputer We also calculate the evolution of dust grains Separate treatment of small particles Synthesize luminosity evolution and model images We have extensively tested the code Code reproduces previous published results		We used the bybrid code to calculate the formation of Earth-like planets. Learn more ...