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1. Baryonic Matter Density

   Linked via "feedback"

   Implications for Dark Matter Halo Structure
   The precise value of $\Omega_b$ has critical implications for modeling the substructure of Dark Matter halos. Since baryons are subject to pressure and cooling mechanisms (unlike pure dark matter), their presence introduces non-gravitational feedback that regulates star formation and dictates the minimum mass of collapsed structures. The efficiency with which baryons cool and collap…