This record provides the current preprint (v3) of “Universal Gravitational Response from SPARC Rotation Curves: Baseline Parameters, Tension Subsets, and an Environment Consistency Test. ” We perform a global fit of a universal Yukawa-type gravitational response function to a quality-selected SPARC sample, profiling stellar mass-to-light ratios per galaxy while fitting two global parameters (₀, m_). We deliberately test the strict null hypothesis that a single, unscreened radial response with constant (₀, m_) can describe the SPARC population. Under this strict null, we identify a tension subset whose fitted mass-to-light ratios saturate prior bounds and which dominates the total misfit, indicating that additional structure (e. g. , environment dependence, mass-dependent running, screening, or improved treatment of observational systematics) may be required. Environmental information is not used in the rotation-curve fit; instead, we report an a posteriori consistency test using an internal residual-based proxy against an independent external environment proxy.
Jan-Frederik Flügge (Sun,) studied this question.