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[submitted] SPARTA: Subhalo and PARticle Trajectory Analysis

SPARTA is an MPI-parallelized C-code framework for the dynamical analysis or particle-based simulations. The code follows the orbits of dynamical tracers such as particles and subhalos in dark matter halos. As a first application, SPARTA can record the first apocenters of all halo particles and compute the splashback radius of halos.

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