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Cold dark matter haloes consist of a relatively smooth dark matter componentas well as a system of bound subhaloes. It is the prevailing practice toinclude all halo mass, including mass in subhaloes, in studies of halo densityprofiles. However, often in observational studies satellites are treated ashaving their own distinct dark matter density profiles in addition to theprofile of the host. This difference makes comparisons between theoretical andobserved results difficult. In this work we investigate density profiles of thesmooth components of host haloes by excluding mass contained within subhaloes.We find that the density profiles of the smooth halo component (withoutsubhaloes) differs substantially from the conventional halo density profile.Smooth profiles decline more rapidly at large radii and are not wellcharacterised by the standard NFW profile. We also find that concentrationsderived from smooth density profiles exhibit less scatter at fixed mass and aweaker mass dependence than standard concentrations. Both smooth and standardhalo profiles can be described by a generalised Einasto profile, an Einastoprofile with a modified central slope, with smaller residuals than either anNFW or Einasto profile. These results hold for both Milky Way-mass andcluster-mass haloes. This new characterisation of smooth halo profiles can beuseful for many analyses, such as lensing and dark matter annihilation, inwhich the smooth and clumpy components of a halo should be accounted forseparately.

Illuminating Dark Matter Halo Density Profiles Without Subhaloes