LSosna/SPARC_Compactness_N123: PARC Compactness Canonical Dataset (v3.1)

SPARC Compactness Canonical Dataset (v3.1) DOI: 10.5281/zenodo.18100150 Canonical N=123 SPARC compactness dataset and reproducibility package accompanying: Sosna (2026) — "Gravitational Compactness of SPARC Galaxies: A Three-Parameter Benchmark for Baryon Retention and Decisive Falsification of Global Dynamical Scaling." Included Files SPARC_Canonical123.csv — canonical dataset (N=123) canonical_FINAL_v3.1.json — canonical parameters BIC_Verification_summary.json — Bayesian model comparison summary SPARC_canonical_rebuild_v3.1.py — reproducibility script CHECKSUMS.txt — SHA-256 verification manifest Empirical_Compactness_Scaling_in_Disk_Galaxies_SUBMISSION_FINAL.pdf — final paper README.md — documentation and parameter summary Canonical Results | Parameter | Value | Description | |------------|--------|-------------| | s | 0.742 ± 0.020 | Compactness slope | | α_direct | 0.296 ± 0.020 | Direct R–M fit | | α_inferred | 0.258 | From 1 − s | | η | 0.10–0.23 | Baryon retention scaling zone | | σ | 0.21 dex | Intrinsic scatter (ΛCDM variance ceiling) | | ΔBIC | +2.6×10⁵ | RAR strongly favored over λ-model | Summary The canonical compactness scaling follows: λ ∝ M_bar^0.742 ± 0.020, with σ = 0.21 dex, establishing η ≈ 0.10–0.23 as the baryon retention target zone. A Bayesian comparison yields ΔBIC = +2.6×10⁵, providing categorical evidence that global-λ scaling is falsified in favor of local acceleration (RAR) dynamics. License Data: CC-BY 4.0 Code: MIT License