The Dependence of the Mass Assembly History of Cold Dark Matter Halos on Environment

  title={The Dependence of the Mass Assembly History of Cold Dark Matter Halos on Environment},
  author={Christian Maulbetsch and Vladimir Avila-Reese and Pedro Col{\'i}n and Stefan Gottloeber and Arman Khalatyan and Martin Wendt Aip Potsdam and Ia-Unam and Mexico. and CRyA-UNAM},
  journal={The Astrophysical Journal},
  pages={53 - 65}
We show by means of a high-resolution N-body simulation how the mass assembly histories of galaxy-sized cold dark matter (CDM) halos depend on environment. Halos in high-density environments form earlier than those in low-density environments, and a higher fraction of their mass is assembled in major mergers. The distribution of the present-day specific mass aggregation rate is strongly dependent on environment. While in low-density environments only ~20% of the halos are not accreting mass at… 

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