A Nuisance-Controlled Audit of Compactness as a Dynamical Variable in SPARC Disk Galaxies

Frozen analysis pipeline, derived data products, figure-generation scripts, and publication-ready figures accompanying Sosna (2026) This study audits whether a global compactness parameter (lambda = G M_bar / R_eff c^2) adds uniquely identifiable predictive information to local disk-galaxy dynamics beyond the radial acceleration relation (RAR), using 126 SPARC galaxies with 2,709 rotation-curve points and a four-model Bayesian comparison (M0-M3). The principal finding is a sharp regime bifurcation: a surviving structure-dynamics residual confined to gas-dominated, low-acceleration systems and consistent with null in stellar-dominated systems. Contents: SPARC_CLEAN_REBUILD.py: Complete frozen pipeline (raw MRT to results) MASTER_RESULTS_FROZEN.json: All numerical results (single source of truth) galaxy_table_clean_rebuild.csv: Per-galaxy summary (126 rows, 39 columns) generate_figures.py, gen_threshold_fig.py: Figure generation scripts generate_tables.py: LaTeX table generation script fig1-fig6: Publication-ready figures (300 DPI PNG) table1-table4: LaTeX table files README_ZENODO.md: Full documentation and reproducibility instructions Software: Python 3, NumPy, SciPy, Matplotlib. Source data: SPARC database (Lelli et al. 2016, AJ 152, 157).