Nonlinear Stochastic Biasing of Galaxies and Dark Halos in Cosmological Hydrodynamic Simulations
نویسندگان
چکیده
Kohji Yoshikawa Department of Astronomy, Kyoto University, Kyoto 606-8502, Japan. Atsushi Taruya Department of Physics, School of Science, University of Tokyo, Tokyo 113-0033, Japan. Y.P. Jing Shanghai Astronomical Observatory, the Partner Group of MPI für Astrophysik, Nandan Road 80, 200030 Shanghai, China. and National Astronomical Observatories, Chinese Academy of Sciences, 100012 Beijing, China. and Yasushi Suto Department of Physics and Research Center for the Early Universe (RESCEU) School of Science, University of Tokyo, Tokyo 113-0033, Japan.
منابع مشابه
Galaxy 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 کاملNonlinear stochastic biasing from the formation epoch distribution of dark halos
We propose a physical model for nonlinear stochastic biasing of one-point statistics resulting from the formation epoch distribution of dark halos. In contrast to previous works on the basis of extensive numerical simulations, our model provides for the first time an analytic expression for the joint probability function. Specifically we derive the joint probability function of halo and mass de...
متن کاملThe Equilibrium Structure of Cosmological Halos: from Dwarf Galaxies to X{ray Clusters
A new model for the postcollapse equilibrium structure of virialized objects which condense out of the cosmological background universe is described and compared with observations and simulations of cosmological halos. The model is based upon the assumption that virialized halos are isothermal, which leads to a prediction of a unique nonsingular isothermal sphere for the equilibrium structure, ...
متن کاملStar Formation History of Dwarf Galaxies in Cosmological Hydrodynamic Simulations
We examine the past and current work on the star formation (SF) histories of dwarf galaxies in cosmological hydrodynamic simulations. The results obtained from different numerical methods are still somewhat mixed, but the differences are understandable if we consider the numerical and resolution effects. It remains a challenge to simulate the episodic nature of SF history in dwarf galaxies at l...
متن کاملHalo Properties in Cosmological Simulations of Self-interacting Cold Dark Matter
We present a comparison of halo properties in cosmological simulations of collisionless cold dark matter (CDM) and self-interacting dark matter (SIDM) for a range of dark matter cross sections. We find, in agreement with various authors, that CDM yields cuspy halos that are too centrally concentrated as compared to observations. Conversely, SIDM simulations using a Monte Carlo N -body technique...
متن کامل