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Zenodo
2026
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| Online Access: | https://doi.org/10.5281/zenodo.19026706 |
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- <p>The gravitating vacuum model proposes that quantum vacuum energy density inside bound structures is approximately 800 times larger than the observed cosmological constant. This paper investigates whether such a dense vacuum affects the physics of Type Ia supernovae — the primary distance indicators of observational cosmology.</p> <p>We demonstrate that direct effects on white dwarf structure are negligible: the fractional change in the Chandrasekhar limit is ΔM_Ch/M_Ch ~ 10⁻²⁸, because the vacuum energy density (~10⁻²⁴ kg/m³) is 33 orders of magnitude below the white dwarf interior density (~10⁹ kg/m³). The carbon ignition conditions, detonation physics, and nickel-56 yield are all unaffected. We further show that the effective gravitational coupling G_eff = G(1 + 2α) does not modify the Chandrasekhar limit: the reclassification of ~5% of the nucleon mass as w = −1 vacuum energy (Paper #3a) does not change the total gravitating mass in the Newtonian limit relevant for white dwarf structure. Type Ia supernovae remain standard candles in this cosmology.</p> <p>We then identify indirect effects through progenitor evolution in the modified gravitational environment. The enhanced effective gravity accelerates stellar evolution timescales by ~1%, modifies the delay-time distribution, and introduces redshift-dependent correlations between host galaxy properties and Hubble diagram residuals. The predicted luminosity correction is of order ε ln(1 + z) with ε ~ 0.01–0.02 magnitudes — below the current systematic floor but within reach of combined LSST, Roman, and Euclid surveys (σ(ε) ~ 0.003 mag). The signal has a distinctive correlation structure: logarithmic in redshift, correlated with host stellar mass, and uncorrelated with color — distinguishable from dust evolution and other systematics.</p> <p>This paper closes a potential logical gap in the research programme: the cosmological parameters are calibrated using SNe Ia distances, and the demonstration that these distances are unmodified ensures the calibration is self-consistent.</p> <p><strong>Keywords:</strong> Type Ia supernovae, Chandrasekhar limit, vacuum energy, distance calibration, Hubble diagram, standard candles, progenitor evolution, cosmological constant, dark energy, dark matter, gravitating vacuum</p> <p><strong>Resource type:</strong> Preprint</p> <p><strong>License:</strong> Creative Commons Attribution 4.0 International (CC BY 4.0)</p> <p><strong>Related identifiers:</strong></p> <ul> <li>Is part of the research programme "What If the Vacuum Gravitates Locally?"</li> <li>Is supplement to: Paper #3a (doi:10.5281/zenodo.19017167), Paper #8, Paper #9, Paper #12</li> </ul> <p><strong>References:</strong> Part of a 17-paper research programme. All completed preprints available at: <a href="https://interdisciplinary-research.institute/cosmology-and-theoretical-physics/">https://interdisciplinary-research.institute/cosmology-and-theoretical-physics/</a></p> <p> </p> <p><strong>Authors:</strong> Kriger, Boris</p> <p><strong>Affiliation:</strong> Institute of Integrative and Interdisciplinary Research, Department of Cosmology and Theoretical Physics</p> <p><strong>ORCID:</strong> 0009-0001-0034-2903</p> <p><strong>Description:</strong> Paper #16 of the research programme "What If the Vacuum Gravitates Locally?"</p>