Total mass beyond r200 for systems with different density profile laws within a Λ backgroundстатья
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Аннотация:Virial masses within some radius in a galaxy system tend to undervalue the true total
mass. Here, we quantify this effect for the standard mass M(r200) up to the radius
within which the mean density is 200𝜌crit.We derive the masses up to the zero-gravity
radius rmax, for a fewcommon density profile laws: the isothermal, the Hernquist, and
the Navarro–Frenk–White profiles, relative to the mass M(r200). Graphs show how
much mass could be missed at different radii, which can be a few M(r200) up to the
zero-gravity radius rmax. One result is that less-concentrated halos can be larger and
more massive up to rmax, relative to M(r200). These data are useful for applications
involving masses of galaxy systems and haloes.