DOI: 10.5281/zenodo.18100150
title: SPARC Compactness Canonical Dataset (N=123): Gravitational Compactness of SPARC Disk Galaxies

description: Canonical N=123 SPARC compactness dataset and analysis package accompanying the paper “Gravitational Compactness of SPARC Disk Galaxies.”

Includes the canonical CSV, parameter JSON, BIC verification file, figures, and Python/Jupyter source scripts used to reproduce all results in the manuscript.

All files validated for cross-platform reproducibility (UTF-8 plain text encoding).

The dataset combines high-quality SPARC (Spitzer Photometry and Accurate Rotation Curves) galaxies selected with standard quality and inclination cuts (Q ≤ 3, 30° < i < 80°). Derived quantities include baryonic mass, effective radius, and the dimensionless disk compactness parameter λ.

All calculations were performed using the sparc_canonical_final.py and SPARC_Canonical_Final-2.ipynb scripts, which replicate the canonical results:

s = 0.742 ± 0.020, α = 0.296 ± 0.020, log₁₀ λₘₑd = −7.14, and ΔBIC = +2.63 × 10⁵ favoring the standard Radial Acceleration Relation (RAR) over any λ-dependent scaling.

Included files:





SPARC_Canonical123.csv — canonical galaxy sample




canonical_FINAL_CORRECTED.json — summary of derived parameters




BIC_Verification_summary.json — Bayesian model comparison results




Source scripts and reproducibility notebook




CHECKSUMS.txt — SHA-256 verification manifest



All data are provided under the CC-BY 4.0 license, and all code under MIT.

This archive is permanently linked to GitHub release v1.0: https://github.com/LSosna/SPARC_Compactness_N123/releases/tag/v1.0

 
description: This release supersedes the previous Zenodo record (v1.0) that contained binary-encoded (.rtf) and non-UTF-8 files.

All text and JSON files have been re-exported in plain UTF-8 encoding to ensure cross-platform readability and reproducibility.

This version is fully synchronized with the GitHub repository LSosna/SPARC_Compactness_N123 and contains:



 The canonical N=123 SPARC compactness dataset (SPARC_Canonical123.csv)

 Derived parameter summary (canonical_FINAL_CORRECTED.json)

BIC verification file (BIC_Verification_summary.json, plain JSON UTF-8)

Full analysis scripts (SPARC_Canonical_Final-2.ipynb, sparc_canonical_final.py)

 Publication figures (Figures 1–4)

README and CHECKSUMS.txt for integrity validation


All numerical values and plots match the canonical manuscript “Gravitational Compactness of SPARC Disk Galaxies” (Sosna 2025).

Status: Finalized, frozen, and archived for citation.
description: Citation Notes






Reference
Why Cited




Fall & Efstathiou 1980
Angular momentum conservation theory


Mo, Mao & White 1998
Disk formation in CDM halos


Lelli et al. 2016a
SPARC database (primary data source)


Lelli et al. 2016b
SPARC photometry


Lelli et al. 2019
Updated BTFR from SPARC


McGaugh et al. 2016
Radial Acceleration Relation


McGaugh & Schombert 2014
3.6μm mass-to-light ratio calibration


Milgrom 1983
MOND introduction


Kass & Raftery 1995
BIC interpretation guidelines


Schwarz 1978
BIC definition


York et al. 2004
Orthogonal distance regression


Efron & Tibshirani 1993
Bootstrap methodology


Tiesinga et al. 2021
CODATA-2018 physical constants




 

@article{Fall1980,  author = {Fall, S. M. and Efstathiou, G.},  title = {Formation and rotation of disc galaxies with haloes},  journal = {MNRAS},  year = {1980},  volume = {193},  pages = {189}}

@article{Lelli2016,  author = {Lelli, F. and McGaugh, S. S. and Schombert, J. M.},  title = {SPARC: Mass Models for 175 Disk Galaxies with Spitzer Photometry and Accurate Rotation Curves},  journal = {AJ},  year = {2016},  volume = {152},  pages = {157}}

@article{McGaugh2016,  author = {McGaugh, S. S. and Lelli, F. and Schombert, J. M.},  title = {Radial Acceleration Relation in Rotationally Supported Galaxies},  journal = {Phys. Rev. Lett.},  year = {2016},  volume = {117},  pages = {201101}}

@article{Schwarz1978,  author = {Schwarz, G.},  title = {Estimating the Dimension of a Model},  journal = {Ann. Stat.},  year = {1978},  volume = {6},  pages = {461}}

@article{York2004,  author = {York, D. and Evensen, N. M. and Mart{\'i}nez, M. L. and De Basabe Delgado, J.},  title = {Unified equations for the slope, intercept, and standard errors of the best straight line},  journal = {Am. J. Phys.},  year = {2004},  volume = {72},  pages = {367}}