Numerical Simulations in Cosmology I: Methods
نویسنده
چکیده
We give a short description of different methods used in cosmology. The focus is on major features of N -body simulations: equations, main numerical techniques, effects of resolution, and methods of halo identification.
منابع مشابه
Numerical Simulations in Cosmology I
The purpose of these lectures is to give a short introduction into a very vast field of numerical simulations for cosmological applications. I focus on major features of the simulations: the equations, main numerical techniques, effects of resolution, and methods of halo identification.
متن کاملThe Impact of AMR in Numerical Astrophysics and Cosmology
I survey the use and impact of adaptive mesh refinement (AMR) simulations in numerical astrophysics and cosmology. Two basic techniques are in use to extend the dynamic range of Eulerian grid simulations in multidimensions: cell refinement, and patch refinement, otherwise known as blockstructured adaptive mesh refinement (SAMR). In this survey, no attempt is made to assess the relative merits o...
متن کاملInitial Conditions to Cosmological N -body Simulations, or How to Run an Ensemble of Simulations
The conventional method of generating initial conditions for cosmological N -body simulations introduces a significant error in the real-space statistical properties of the particles. More specifically, the finite box size leads to a significant underestimate of σ8, the correlation function, and nonlinear effects. I implement a method of generating initial conditions for N -body simulations tha...
متن کاملCosmic Walls and Filaments Formation in Modied Chaplygin Gas Cosmology
We want to study the perturbation growth of an initial seed of an ellipsoidal shape in Top-Hat collapse model of the structure formation in the Modied Chaplygin gas cosmology. Considering reasonable values of the constants and the parameters of the model under study, we can show that a very small deviation from spherical symmetry (ellipsoidal geometry) in the initial seed leads to a nal highly ...
متن کاملKeys to Cosmology – Clusters of Galaxies
We review several aspects of clusters of galaxies and their application to cosmology. We present first results of numerical simulations of the dynamics of the intra-cluster gas and of different interaction processes between cluster galaxies and the intra-cluster gas. In particular metallicity maps are very useful to determine the importance of the different interaction processes. Also mass dete...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2008