Simulating structure formation of the Local Universe

@article{Hess2013SimulatingSF,
  title={Simulating structure formation of the Local Universe},
  author={Steffen Hess and Francisco-Shu Kitaura and Stefan Gottloeber},
  journal={Monthly Notices of the Royal Astronomical Society},
  year={2013},
  volume={435},
  pages={2065-2076}
}
In this work we present cosmological N-body simulations of the Local Universe with initial conditions constrained by the Two-Micron Redshift Survey (2MRS) within a cubic volume of 180 Mpc/h side-length centred at the Local Group. We use a self-consistent Bayesian based approach to explore the joint parameter space of primordial density fluctuations and peculiar velocity fields, which are compatible with the 2MRS galaxy distribution after cosmic evolution. This method (the KIGEN-code) includes… 

ELUCID—Exploring the Local Universe with the reConstructed Initial Density Field. II. Reconstruction Diagnostics, Applied to Numerical Halo Catalogs

The ELUCID project aims to build a series of realistic cosmological simulations that reproduce the spatial and mass distributions of the galaxies as observed in the Sloan Digital Sky Survey. This

Cosmicflows Constrained Local UniversE Simulations

This paper combines observational datasets and cosmological simulations to generate realistic numerical replicas of the nearby Universe. These latter are excellent laboratories for studies of the

BIRTH of the COSMOS field: primordial and evolved density reconstructions during cosmic high noon

This work presents the first comprehensive study of structure formation at the peak epoch of cosmic star formation over $1.4\leq z \leq 3.6$ in the COSMOS field, including the most massive high

Cosmic flows and the expansion of the local Universe from non-linear phase-space reconstructions

This work investigates the impact of cosmic flows and density perturbations on Hubble constant $H_0$ measurements using nonlinear phase-space reconstructions of the Local Universe (LU). In

ELUCID—EXPLORING THE LOCAL UNIVERSE WITH THE RECONSTRUCTED INITIAL DENSITY FIELD. I. HAMILTONIAN MARKOV CHAIN MONTE CARLO METHOD WITH PARTICLE MESH DYNAMICS

Simulating the evolution of the local universe is important for studying galaxies and the intergalactic medium in a way free of cosmic variance. Here we present a method to reconstruct the initial

ELUCID—EXPLORING THE LOCAL UNIVERSE WITH RECONSTRUCTED INITIAL DENSITY FIELD. III. CONSTRAINED SIMULATION IN THE SDSS VOLUME

A method we developed recently for the reconstruction of the initial density field in the nearby universe is applied to the Sloan Digital Sky Survey Data Release 7. A high-resolution N-body

Large-scale dark matter simulations

We review the field of collisionless numerical simulations for the large-scale structure of the Universe. We start by providing the main set of equations solved by these simulations and their

Bayesian cosmic density field inference from redshift space dark matter maps.

Novel algorithmic implementations are introduced regarding the mass assignment kernels when defining the dark matter density field and optimization of the time-step in the Hamiltonian equations of motions and the resulting reconstructed fields are isotropic and their power spectra are unbiased compared to the true field defined by the authors' mock observations.

Simulations of the Local Universe constrained by observational peculiar velocities

Peculiar velocities, obtained from direct distance measur ements, are data of choice to achieve constrained simulations of the Local Universe reliable down to a scale of a few Megaparsecs. Unlike

Dark matter in the Local Universe

...

References

SHOWING 1-10 OF 68 REFERENCES

The Initial Conditions of the Universe from Constrained Simulations

A new approach to recover the primordial density fluctuations and the cosmic web structure underlying a galaxy distribution and second order Lagrangian Perturbation Theory is used and the presented approach is flexible to adopt any structure formation model.

Simulating Our Cosmological Neighborhood: Mock Catalogs for Velocity Analysis

We describe the construction of an N-body simulation that mimics the true velocity and mass-density fields in a box of side 256\hmpc about the Local Group , and the production of mock catalogs that

The dark matter assembly of the Local Group in constrained cosmological simulations of a LambdaCDM universe

We make detailed theoretical predictions for the assembly properties of the Local Group (LG) in the standard LambdaCDM cosmological model. We use three cosmological N-body dark matter simulations

Precision constrained simulation of the local Universe

We use the formalism of constrained Gaussian random fields to compute a precise large-scale simulation of the 60 h −1 Mpc volume of our local Universe. We derive the constraints from the

THE CHALLENGE OF THE LARGEST STRUCTURES IN THE UNIVERSE TO COSMOLOGY

Large galaxy redshift surveys have long been used to constrain cosmological models and structure formation scenarios. In particular, the largest structures discovered observationally are thought to

Simulations of the formation, evolution and clustering of galaxies and quasars

It is shown that baryon-induced features in the initial conditions of the Universe are reflected in distorted form in the low-redshift galaxy distribution, an effect that can be used to constrain the nature of dark energy with future generations of observational surveys of galaxies.

RECONSTRUCTION OF COSMOLOGICAL INITIAL CONDITIONS FROM GALAXY REDSHIFT CATALOGUES

We present and test a new method for the reconstruction of cosmological initial conditions from a full-sky galaxy catalogue. This method, called ZTRACE, is based on a self-consistent solution of the

Simulating the formation of the local galaxy population

We simulate the formation and evolution of the local galaxy population, starting from initial conditions with a smoothed linear density field which matches that derived from the IRAS 1.2-Jy galaxy

Constrained Simulations of the Real Universe: The Local Supercluster

We present cosmological simulations that closely mimic the real uiverse within ~100 Mpc of the Local Group. The simulations, called constrained simulations, reproduce the large-scale density field

Reconstructing the Initial Density Field of the Local Universe: Methods and Tests with Mock Catalogs

Our research objective in this paper is to reconstruct an initial linear density field, which follows the multivariate Gaussian distribution with variances given by the linear power spectrum of the
...