Fixed baryon profiles with free nonnegative mass scales cannot fit 25 of 74 selected SPARC curves within 4.332465 listed speed errors

We test the gas, stellar disk, and bulge force profiles released by SPARC. Each component has one constant nonnegative mass scale with no upper bound. The main sample has quality Q=1, inclination from 30 degrees up to but below 80 degrees, and at least five rows. All rows are used. With fixed profiles and speed bounds of 4.332465 times each listed error, 25 of 74 curves have no allowed fit. Under calibrated centered Gaussian marginal speed errors, a union bound gives at least 95% simultaneous coverage of all 3391 source rows. Error independence is not required. The source does not establish this Gaussian calibration. Adding 5 km/s in quadrature reduces the main exclusion count to three. Adding 10 km/s leaves NGC2903. Earlier observations report central noncircular motion and a different inner rise for that galaxy. The exclusions do not identify a physical cause. Numerical linear programs propose evidence. Exact rational checks confirm all 1400 galaxy and case pairs for eight tests across all 175 galaxies. The package gives fits, sparse exclusion weights, bounds on minimum error multipliers and floors, source bytes, provenance, code, figures, and an independent verifier. The contribution is a complete conditional benchmark for the stated data and bounds, not a new baryonic scaling model.

SPARC · galaxy rotation curves · baryonic scaling · linear programming · exact arithmetic · simultaneous error bounds · NGC2903 · reproducible research