TheHaloMod: An online calculator for the halo model
TLDR
The basic formulation of the halo model and several of its components are reviewed in the context of galaxy two-point statistics, developing a coherent framework for its application.Abstract:
The halo model is a successful framework for describing the distribution of matter in the Universe -- from weak lensing observables to galaxy 2-point correlation functions. We review the basic formulation of the halo model and several of its components in the context of galaxy two-point statistics, developing a coherent framework for its application.
We use this framework to motivate the presentation of a new Python tool for simple and efficient calculation of halo model quantities, and their extension to galaxy statistics via a \textit{halo occupation distribution}, called \halomod. This tool is efficient, simple to use, comprehensive and importantly provides a great deal of flexibility in terms of custom extensions. This Python tool is complemented by a new web-application at https://thehalomod.app that supports the generation of many halo model quantities directly from the browser -- useful for educators, students, theorists and observers.read more
Citations
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The Scale-Dependence of Halo Assembly Bias
TL;DR: In this article, the scale-dependent assembly bias of the two-point clustering of dark matter halos is studied and shown to be influenced by halo properties besides mass, a phenomenon referred to as halo assembly bias.
Journal Article
Galaxy-Galaxy Lensing in Dark Energy Survey Science Verification Data
TL;DR: In this article, the authors present galaxy-galaxy lensing results from 139 deg(2) of the DES Science Verification (SV) data, which are specifically selected to have a low photometric redshift error and outlier rate.
Journal ArticleDOI
Responses of Halo Occupation Distributions: a new ingredient in the halo model & the impact on galaxy bias
TL;DR: In this paper, the authors investigate the impact of long-wavelength perturbations on the response of the HODs to longwavelength observations and find that the effect of these perturbation on the bias of the gas distribution is not negligible in general.
Posted Content
An Intensity Mapping Constraint on the CO-Galaxy Cross Power Spectrum at Redshift ~ 3
TL;DR: In this article, a 2-sigma upper bound on the band-averaged CO-galaxy cross-power of the CO brightness power spectrum has been established, and the expected cross-spectrum spectrum is forecast by applying a number of literature prescriptions for the CO luminosity to halo mass relation.
Proceedings Article
The Luminosity and Color Dependence of the Galaxy Correlation Function
TL;DR: The HOD model fits nicely explain the color dependence of wp(rp) and the cross correlation between red and blue galaxies, and a conditional luminosity function (at fixed halo mass) in which central galaxies lie far above a Schechter function extrapolation of the satellite population.
References
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Journal ArticleDOI
Haloes gone MAD: The Halo-Finder Comparison Project
Alexander Knebe,Steffen R. Knollmann,Stuart I. Muldrew,Frazer R. Pearce,Miguel A. Aragon-Calvo,Yago Ascasibar,Peter Behroozi,Daniel Ceverino,Stephane Colombi,Juerg Diemand,Klaus Dolag,Bridget Falck,Patricia Fasel,Jeffrey P. Gardner,Stefan Gottloeber,Chung-Hsing Hsu,Francesca Iannuzzi,Anatoly Klypin,Zarija Lukić,Michal Maciejewski,Cameron K. McBride,Mark C. Neyrinck,Susana Planelles,Doug Potter,Vicent Quilis,Yann Rasera,Justin I. Read,Paul M. Ricker,Fabrice Roy,Volker Springel,Joachim Stadel,Greg Stinson,Paul M. Sutter,V. Turchaninov,Dylan Tweed,Gustavo Yepes,Marcel Zemp +36 more
TL;DR: In this paper, a detailed comparison of fundamental dark matter halo properties retrieved by a substantial number of different halo finders is presented, including friends-of-friends (FOF), spherical-overdensity (SO), and phase-space based algorithms.
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The Growth and Structure of Dark Matter Haloes
TL;DR: In this article, the mass-accretion histories and structural properties of dark halos were analyzed in high-resolution N-body simulations, and a correlation between the inner scale radius of a halo and the mass within it was found.
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A Universal Model for Halo Concentrations
TL;DR: In this article, the authors present a numerical study of dark matter halo concentrations in?CDM and self-similar cosmologies, and show that the relation between concentration, c, and peak height exhibits the smallest deviations from universality if halo masses are defined with respect to the critical density of the universe.
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Galaxy formation and large scale bias
TL;DR: In this article, a simple approach to understand the physical origin of bias in the distribution of galaxies relative to that of dark matter is proposed, and the results of semi-analytic models of galaxy formation are tuned to fit the observed luminosity functions of local groups and clusters.