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TreePM: A code for cosmological N-body simulations

Abstract

We describe the TreePM method for carrying out large N-Body simulations to study formation and evolution of the large scale structure in the Universe. This method is a combination of Barnes and Hut tree code and Particle-Mesh code. It combines the automatic inclusion of periodic boundary conditions of PM simulations with the high resolution of tree codes. This is done by splitting the gravitational force into a short range and a long range component. We describe the splitting of force between these two parts. We outline the key differences between TreePM and some other N-Body methods.

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Bagla, J.S. TreePM: A code for cosmological N-body simulations. J Astrophys Astron 23, 185–196 (2002). https://doi.org/10.1007/BF02702282

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  • DOI: https://doi.org/10.1007/BF02702282

Key words

  • Gravitation
  • methods:numerical
  • cosmology:large scale structure of the universe