Dependence of halo bias on mass and environment

Understand

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.