 Navarro–Frenk–White profile

The Navarro--Frenk--White profile isIt has an inner $r^{-1}$ density cusp and an outer $r^{-3}$ tail.

The Navarro–Frenk–White (NFW) profile is a mathematical model that describes the density distribution of dark matter in galaxies and galaxy clusters. It was introduced by the astrophysicists Julio Navarro, Carlos Frenk, and Simon White in their 1996 paper. The NFW profile is significant in cosmology and astrophysical studies because it provides insights into how dark matter is structured in the universe.