Halo statistics analysis within medium volume cosmological N-body simulation
نویسندگان
چکیده
منابع مشابه
Energy Ranking Preservation in a N-Body Cosmological Simulation
In this paper we present a study of the cosmic flow from the point of view of how clusterings at different dynamical regimes in an expanding universe evolve according to a ‘coarse-grained’ partitioning of their ranked energy distribution. By analysing a ΛCDM cosmological simulation from the Virgo Project, we find that cosmic flows evolve in an orderly sense, when tracked from their coarse-grain...
متن کاملEffects of finite box size in cosmological N-body simulations II : Halo formation and destruction rates
In this study we show how errors due to finite box size affect formation and destruction rates for haloes in cosmological Nbody simulations. In an earlier study we gave an analytic prescription of finding the corrections in the mass function. Following the same approach, in this paper we give analytical expressions for corrections in the formation rates, destruction rates and the rate of change...
متن کاملHalo Models of Large Scale Structure and Reliability of Cosmological N -Body Simulations
Halo models of the large scale structure of the Universe are critically examined, focusing on the definition of halos as smooth distributions of cold dark matter. This definition is essentially based on the results of cosmological N-body simulations. By a careful analysis of the standard assumptions of halo models and N-body simulations and by taking into account previous studies of self-simila...
متن کاملOptimal Softening for N -body Halo Simulations
We propose to determine the optimal softening length in N -body halo simulations by minimizing the ensemble-average acceleration error at a small radius r0. This strategy ensures that the error never exceeds the optimal value beyond r0. Furthermore, we derive semi-analytic formulae for calculating the acceleration error due to the discreteness of particles and softened gravity, which are valida...
متن کاملGalaxy tracers in cosmological N-body simulations
Galaxies, and the large-scale structure that they trace, grew via gravitational instability from small amplitude Gaussian density fluctuations. This nonlinear process can be studied by means of N -body simulations. The main target of this approach is to evaluate various cosmological theories of structure formation. Unfortunately, the dynamical range of current cosmological simulations is inadeq...
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: Serbian Astronomical Journal
سال: 2015
ISSN: 1450-698X,1820-9289
DOI: 10.2298/saj1590011m