Large-scale bias of dark matter halos

Abstract

We build a simple analytical model for the bias of dark matter halos that applies to objects defined by an arbitrary density threshold, $200\leq\deltas\leq 1600$, and that provides accurate predictions from low-mass to high-mass halos. We point out that it is possible to build simple and efficient models, with no free parameter for the halo bias, by using integral constraints that govern the behavior of low-mass and typical halos, whereas the properties of rare massive halos are derived through explicit asymptotic approaches. We also describe how to take into account the impact of halo motions on their bias, using their linear displacement field. We obtain a good agreement with numerical simulations for the halo mass functions and large-scale bias at redshifts $0\le z\le 2.5$, for halos defined by a nonlinear density threshold $200\leq\deltas\leq 1600$. We also evaluate the impact on the halo bias of two common approximations, i) neglecting halo motions, and ii) linearizing the halo two-point correlation.

12 pages

References in corpus (4)

• The Large Scale Bias of Dark Matter Halos: Numerical Calibration and Model Tests
• The virialized mass of dark matter haloes
• Baryon acoustic signature in the clustering of density maxima
• Clustering properties of a type-selected volume-limited sample of galaxies in the CFHTLS

Cited by in corpus (12)

• Large-Scale Galaxy Bias
• Combining perturbation theories with halo models
• Clustering, Bias and the Accretion Mode of X-ray selected AGN
• CLASS_GWB: robust modeling of the astrophysical gravitational wave background anisotropies
• BAM: Bias Assignment Method to generate mock catalogs
• The cosmic web connection to the dark matter halo distribution through gravity
• A Consistent Comparison of Bias Models using Observational Data
• The generalized evolution of linear bias: a tool to test gravity
• Testing General Relativity Using the Evolution of Linear Bias
• The Cosmological Supersymmetron
• Comparison of the linear bias models in the light of the Dark Energy Survey
• The Origin of the Orbital Parameter Distribution of Merging Halos