On the Origin of the Inner Structure of Halos

@article{Manrique2003OnTO,
  title={On the Origin of the Inner Structure of Halos},
  author={Alberto Manrique and Andreu Raig and Eduard Salvador-Sol{\'e} and Teresa Barber Sanch{\'i}s and Jos{\'e} Mar{\'i}a Solanes},
  journal={The Astrophysical Journal},
  year={2003},
  volume={593},
  pages={26-37}
}
We calculate by means of the Press-Schechter formalism the density profile developed by dark matter halos during accretion, i.e., the continuous aggregation of small clumps. We find that the shape of the predicted profile is similar to that shown by halos in high-resolution cosmological simulations. Furthermore, the mass-concentration relation is correctly reproduced at any redshift in all the hierarchical cosmologies analyzed except for very large halo masses. The role of major mergers, which… 

Figures from this paper

Extended Press–Schechter theory and the density profiles of dark matter haloes
An inside-out model for the formation of haloes in a hierarchical clustering scenario is studied. The method combines the picture of the spherical infall model and a modification of the extended
The Nature of Dark Matter and the Density Profile and Central Behavior of Relaxed Halos
We show that the two basic assumptions of the model recently proposed by Manrique and coworkers for the universal density profile of cold dark matter (CDM) halos, namely, that these objects grow
Semi-analytical predictions of density profiles for ΛCDM haloes
We combine the results of merger trees realizations, predicted by the extended Press-Schechter theory, to the assumption of “stable clustering” in order to calculate density profiles of dark matter
On the physical origin of dark matter density profiles
The radial mass distribution of dark matter haloes is investigated within the framework of the spherical infall model. We present a new formulation of spherical collapse including non-radial motions,
Secondary infall and dark matter haloes
We test the secondary infall model (SIM) by direct comparison with the results of N-body simulations. Eight cluster-size and six galactic-size dark matter haloes have been selected at z = 0 and
A solution to the problems of cusps and rotation curves in dark matter halos in the cosmological standard model
We discuss various aspects of the inner structure formation in virialized dark matter (DM) halos that form as primordial density inhomogeneities evolve in the cosmological standard model. The main
Scale radii and aggregation histories of dark haloes
Relaxed dark matter haloes are found to exhibit the same universal density profiles regardless of whether they form in hierarchical cosmologies or via spherical collapse. Likewise, the shape
The accretion history of dark matter haloes - III. A physical model for the concentration-mass relation
We present a semi-analytic, physically motivated model for dark matter halo concentration as a function of halo mass and redshift. The semi-analytic model is intimately based on hierarchical
Implications of Halo Inside-Out Growth for the X-Ray Properties of Nearby Galaxy Systems within the Preheating Scenario
We present an entirely analytic model for a preheated, polytropic intergalactic medium in hydrostatic equilibrium within an NFW dark halo potential in which the evolution of the halo structure
Fingerprints of the initial conditions on the density profiles of cold and warm dark matter haloes
We use N-body simulations of dark matter haloes in cold dark matter (CDM) and a large set of different warm dark matter (WDM) cosmologies to demonstrate that the spherically averaged density profile
...
1
2
3
4
5
...

References

SHOWING 1-10 OF 54 REFERENCES
Merger versus Accretion and the Structure of Dark Matter Halos
High-resolution N-body simulations of hierarchical clustering in a wide variety of cosmogonies show that the density profiles of dark matter halos are universal, with low-mass halos being denser than
On the Formation and Evolution of Disk Galaxies: Cosmological Initial Conditions and the Gravitational Collapse
We use a semianalytical approach and the standard σ8 = 1 cold dark matter (SCDM) cosmological model to study the gravitational collapse and virialization, the structure, and the global and
Mass growth and density profiles of dark matter haloes in hierarchical clustering
We develop a model for the growth of dark matter haloes and use it to study their evolved density profiles. In this model, haloes are spherical and form by quiescent accretion of matter in clumps,
How Universal Are the Density Profiles of Dark Halos
We use high-resolution N-body simulations to investigate the formation of virialized halos due to the gravitational collapse of collisionless matter. A variety of formation scenarios are studied,
Resolving the Structure of Cold Dark Matter Halos
We examine the effects of mass resolution and force softening on the density profiles of cold dark matter halos that form within cosmological N-body simulations. As we increase the mass and force
Universal profile of dark matter haloes and the spherical infall model
I propose a modification of the spherical infall model for the evolution of density fluctuations with initially Gaussian probability distribution and scale-free power spectra in Einstein-de Sitter
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
Resolving the Structure of Cold Dark Matter Halos
We present results of a convergence study in which we compare the density profiles of cold dark matter halos simulated with varying mass and force resolutions. We show that although increasing the
The structure and dynamical evolution of dark matter haloes
We use N-body simulations to investigate the structure and dynamical evolution of dark matter halos in clusters of galaxies. Our sample consists of nine massive halos from an Einstein-De Sitter
Merger rates in hierarchical models of galaxy formation
We present an analytical description of the merging of virialized haloes which is applicable to any hierarchical model in which structure grows via gravitational instability. The formulae are an
...
1
2
3
4
5
...