RD Galaxy Dynamics Phase-Transition Dataset (SPARC + ATLAS³D)

This dataset contains the complete analysis pipeline and results used toevaluate whether a structural phase transition may exist in galactic dynamics,as quantified by the unified dynamical parameter τ. The dataset includes 109 SPARC spiral galaxies and 89 ATLAS³D ellipticalgalaxies with full TDGL (Time-Dependent Ginzburg–Landau) fits applied torotation curves and velocity-dispersion profiles. All derived parameters(κ₁, ξ_GL, r_core, η, τ) are provided along with the Python scripts requiredfor full reproducibility. Across the sample analysed, all rotation-supported SPARC galaxies exhibitτ > 0, while the majority of pressure-supported ATLAS³D ellipticals exhibitτ < 0, with S0 galaxies clustering near τ ≈ 0. This separation suggests apossible dynamical phase boundary in galaxy structure, though independentvalidation is encouraged. Files included:• Raw SPARC and ATLAS³D datasets (for transparency)• TDGL fitting code (rotation curves and Jeans modelling)• Derived parameter tables for all 194 galaxies• Publication-quality figures• Documentation describing the methods and theoretical context This dataset is intended to support independent replication, verification,and further investigation into dynamical structure in galaxies.