2025/07/04 by Hayashi, Shintaro K.
Medicine · Physics and Astronomy · #Biofield Effects and Biophysics #Cosmology and Gravitation Theories #Cosmology and Nongalactic Astrophysics (astro-ph.CO) #FOS: Physical sciences #Relativity and Gravitational Theory
paper · pdf · doi:10.48550/arxiv.2507.03408
openalex publication_date 2025/07/04 · openalex created_date 2025/10/20 · openalex updated_date 2026/08/03
Dark energy(DE) remains one of the most important subjects in modern cosmology, and its physical origin is still under intensive discussion. While an astrophysical origin of DE is a highly challenging scenario, black holes stand out the most promising candidates as the astrophysical origin. In this paper, we explore a new model of DE induced by black holes, in which cosmic accelerated expansion caused by de-Sitter like space-time regions around the non-singular black holes. It is difficult to examine such a phenomena by measuring black hole mass because the energy density of the cosmological constant is much smaller than the mass density of a black hole near a black hole. On the other hand, this modification becomes dominant on the cosmological scale. Therefore, we focus on the cosmological probes and perform the MCMC analysis using Planck2018+DESI DR2+Supernovae. Since the total amount of DE density depends on the contributions of all black holes, we use the simulated results for the evolution of the number of black holes. As a result, we obtain the best-fitted total chi-squared value, χtotal2 = 2871.13 compared to ΛCDM case χtotal, ΛCDM2 = 2819.00, and Δχ2 ∼ 50. We conclude that this Δχ2 is enough large to rule out this model, because the number of parameters is same between this model and ΛCDM.