Value (31) of ρcrb for various halo masses (solid line). For the entire range of galactic masses (Mvir ≃ 109−1012 M⊙) multiplication ρcrb remains almost constant. According to Eq. (22), ρcrb is inversely proportional to ⟨ α ⟩. The dashed line represents ρcrb, if we use a lower value of ⟨ α ⟩ (Eq. (32) instead of (23)). This agrees well with observations (log (ρcrb) = 2.15 ± 0.2 in units of log (M⊙ pc-2)).
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