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Fig. 4.
Accuracy of different approximations (LGM: Lima Neto et al. 1999; SP: Simonneau & Prada 1999, 2004; EV: Emsellem & van de Ven 2008) and our new one (Eq. (28)) as a function of Sérsic index. We note that the EV model performs better at specific values of n that are often missed in our logarithmic grid of 1000 values of n.
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