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

@article{Maulbetsch2007TheDO,
  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},
  year={2007},
  volume={654},
  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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References

SHOWING 1-10 OF 84 REFERENCES

The Dependence on Environment of Cold Dark Matter Halo Properties

A series of high-resolution ΛCDM cosmological N-body simulations are used to study the properties of galaxy-size dark halos as a function of global environment. We analyze halos in three types of

The growth and structure of dark matter haloes

In this paper, we analyse in detail the mass-accretion histories and structural properties of dark haloes in high-resolution N-body simulations. We model the density distribution in individual haloes

Concentrations of Dark Halos from Their Assembly Histories

We study the relation between the density profiles of dark matter halos and their mass assembly histories using a statistical sample of halos in a high-resolution N-body simulation of the ΛCDM

Environmental influences on dark matter haloes and consequences for the galaxies within them

We use large N-body simulations of dissipationless gravitational clustering in cold dark matter (CDM) cosmologies to study whether the properties of dark matter halos are affected by their

The age dependence of halo clustering

We use a very large simulation of the concordance Λ cold dark matter cosmogony to study the clustering of dark matter haloes. For haloes less massive than about 1013 h−1 M⊙ the amplitude of the

The universal mass accretion history of cold dark matter haloes

We use the extended Press-Schechter formalism to investigate the rate at which cold dark matter haloes accrete mass. We discuss the shortcomings of previous methods that have been used to compute the

Mass and Redshift Dependence of Dark Halo Structure

Using a combination of N-body simulations with different resolutions, we study in detail how the concentrations of cold dark matter halos depend on halo mass at different redshifts. We confirm that

The Power Spectrum Dependence of Dark Matter Halo Concentrations

High-resolution N-body simulations are used to examine the power spectrum dependence of the concentration of galaxy-sized dark matter halos. It is found that dark halo concentrations depend on the

On the environmental dependence of halo formation

ABSTRACT A generic prediction of hierarchical gravitationalclustering models is that the distribu-tion of halo formation times should depend relatively strongly on halo mass, massivehaloes forming

Merging History as a Function of Halo Environment

According to the hierarchical scenario, galaxies form via merging and accretion of small objects. Using N-body simulations, we study the frequency of merging events in the history of the halos. We
...