The shape of dark matter halos: A new fundamental cosmological invariance

Open Access

Fig. 20

Median prolaticity as a function of ellipticity (left) or triaxiality (right). The relationships between the various shape parameters do not depend on the cosmological model. It is a direct consequence of the fact that there exists a variable $(\log σ_{N L}^{- 1})$ $\[\left(\log ~\sigma_{N L}^{-1}\right)\]$ to which median shape parameters are universally related (see main text).

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