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The Einasto profile (or Einasto model) is a mathematical function that describes how the density
The Einasto profile possesses a power law logarithmic slope of the form:
which can be rearranged to give
The parameter
The larger
Einasto's model has the same mathematical form as Sersic's law, which is used to describe the surface brightness (i.e. projected density) profile of galaxies.
Einasto's model has been used to describe many types of system, including galaxies and dark matter halos.