Extended Fitting Analysis on Additional SPARC Galaxies – Supplementary Material to "Emergence of a Universal Acceleration Scale from a Minimal Nonlinear Gravitational Model Applied to SPARC Galaxies"

This document provides supplementary material to the preprint"Emergence of a Universal Acceleration Scale from a Minimal Nonlinear Gravitational Model Applied to SPARC Galaxies". The analysis extends the nonlinear fitting procedure to an additional independent sample of 20 galaxies from the SPARC database. The resulting acceleration scale g* remains of order 10^-10 m s^-2, with a median value of approximately 1.12 × 10^-10 m s^-2. This appendix is intended to test the robustness of the fitted acceleration scale on an expanded observational sample and to provide complementary statistical information to the main paper.