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Galaxies are built by complex physical processes with significant inherentstochasticity. It is therefore surprising that the inferred dark matterdistributions in galaxies are strongly correlated with the observed baryondistributions leading to various `Baryon-Halo conspiracies'. The fact that nodark matter candidate has been definitively identified invites a search foralternative explanations for such correlations and we present an approachmotivated by the behaviors of self organized patterns. We propose a nonlocalrelativistic Lagrangian theory for a `pattern field' which acts as an`effective dark matter', built on the idea that defects in this pattern fieldcouple to the baryonic matter distribution. Our theory accounts for the grossstructure of cold disk galaxies. We compute galactic rotation curves and derivevarious galaxy scaling relations including Renzo's rule, the radialacceleration relation, and the existence of the Freeman limit for centralsurface brightness.

Disk galaxies and their dark halos as self-organized patterns