Dependence of halo bias on mass and environment

Abstract

The simplest analyses of halo bias assume that halo mass alone determines halo clustering. However, if the large scale environment is fixed, then halo clustering is almost entirely determined by environment, and is almost completely independent of halo mass. We show why. Our analysis is useful for studies which use the environmental dependence of clustering to constrain cosmological and galaxy formation models. It also shows why many correlations between galaxy properties and environment are merely consequences of the underlying correlations between halos and their environments, and provides a framework for quantifying such inherited correlations.

9 pages, 6 figures, accepted by MNRAS

References in corpus (4)

• A Halo Model of Galaxy Colors and Clustering in the SDSS
• Strong clustering of underdense regions and the environmental dependence of clustering from Gaussian initial conditions
• Perturbation theory and excursion set estimates of the probability distribution function of dark matter, and a method for reconstructing the initial distribution function
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• The Beyond-Halo Mass Effects of the Cosmic Web Environment on Galaxies
• Toward Accurate Modeling of Galaxy Clustering on Small Scales: Halo Model Extensions and Lingering Tension
• Non-Gaussian assembly bias from a semi-analytic galaxy formation model
• The galaxy bias profile of cosmic voids
• Secondary halo bias through cosmic time II: Reconstructing halo properties using clustering information
• Evaluating the origins of the secondary bias based on the correlation of halo properties with the linear density field
• Galaxy assembly bias and large-scale distribution: a comparison between IllustrisTNG and a semi-analytic model
• The evolution of the halo occupation distribution in cosmic voids
• Indicator Functions: Distilling the Information from Gaussian Random Fields