Initial Conditions For Large Cosmological Simulations
نویسندگان
چکیده
منابع مشابه
Initial Conditions for Large Cosmological Simulations
This technical paper describes a software package that was designed to produce initial conditions for large cosmological simulations in the context of the Horizon collaboration. These tools generalize E. Bertschinger’s Grafic1 software to distributed parallel architectures and offer a flexible alternative to the Grafic2 software for “zoom” initial conditions, at the price of large cumulated cpu...
متن کاملMulti-scale initial conditions for cosmological simulations
We discuss a new algorithm to generate multi-scale initial conditions with multiple levels of refinements for cosmological “zoom-in” simulations. The method uses an adaptive convolution of Gaussian white noise with a real space transfer function kernel together with an adaptive multi-grid Poisson solver to generate displacements and velocities following first (1LPT) or second order Lagrangian p...
متن کاملTransients from Initial Conditions in Cosmological Simulations
We study the impact of setting initial conditions in numerical simulations using the standard procedure based on the Zel’dovich approximation (ZA). As it is well known from perturbation theory, ZA initial conditions have incorrect second and higher-order growth and therefore excite long-lived transients in the evolution of the statistical properties of density and velocity fields. We also study...
متن کاملCosmological Simulations with Scale-Free Initial Conditions II: Radiative Cooling
The growth of structure from scale-free initial conditions is one of the most important tests of cosmological simulation methods, providing a realistically complex problem in which numerical results can be compared to rigorous analytic scaling laws. Previous studies of this problem have incorporated gravitational dynamics and adiabatic gas dynamics, but radiative cooling, an essential element o...
متن کاملCosmological Simulations with Scale-Free Initial Conditions I: Adiabatic Hydrodynamics
We analyze hierarchical structure formation based on scale-free initial conditions in an Einstein-de Sitter universe, including a baryonic component with Ωbary = 0.05. We present three independent, smoothed particle hydrodynamics (SPH) simulations, performed at two resolutions (323 and 643 dark matter and baryonic particles), and with two different SPH codes (TreeSPH and P3MSPH). Each simulatio...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: The Astrophysical Journal Supplement Series
سال: 2008
ISSN: 0067-0049,1538-4365
DOI: 10.1086/590370