The Hyperbolic Vacuum: A Zero-Parameter Cosmology and an Exact Solution of Einstein's Field Equations

作者：DESI Collaboration, Abdul-Karim, M., Aguilar, J., Ahlen, S., Alam, S., Allen, L., C. Allende Prieto, O. Alves, Anand, A., Andrade, U., Armengaud, E., Aviles, A., Bailey, S., Baltay, C., Prapti Bansal, Bault, A., Behera, J., BenZvi, S., Bianchi, D., Blake, C., S. Brieden, Brodzeller, A., Brooks, D., Buckley-Geer, E., Burtin, E., Calderon, R., R. E. A. Canning, Rosell, A. Carnero, Carrilho, P., Casas, L., Castander, F. J., Cereskaite, R., Charles, M., Chaussidon, E., Chaves-Montero, J., Chebat, D., Chen, X., Claybaugh, T., S. Cole, Andrew P. Cooper, Cuceu, A., K. S. Dawson, de la Macorra, A., de Mattia, A., Deiosso, N., Della Costa, J., Demina, R., Arjun Dey, Dey, B., Ding, Z., Doel, P., Jerry Edelstein, Eisenstein, D. J., Elbers, W., Fagrelius, P., K. Fanning, Fernández-García, E., Ferraro, S., Font-Ribera, A., J. E. Forero-Romero, Carlos S. Frenk, Garcia-Quintero, C., Lehman H. Garrison, Gaztañaga, E., Gil-Marín, H., Satya Gontcho A Gontcho, D. González, Gonzalez-Morales, A. X., Gordon, C., Green, D., Gutierrez, G., Guy, J., Boryana Hadzhiyska, Hahn, C., He, S., M. Herbold, Herrera-Alcantar, H. K., Ho, M., K Honscheid, Cullan Howlett, Huterer, D., Ishak, M., Juneau, S., Kamble, N. V., Karaçaylı, N. G., Kehoe, R., Kent, S., A. G. Kim, Kirkby, D., Kisner, T., S. E. Koposov, Anthony Kremin, Krolewski, A., O. Lahav, Lamman, C., M. Landriau, Lang, D., Lasker, J., Goff, J. M. Le, Guillou, L. Le, Leauthaud, A., Levi, M. E., Li, Q., Li, T. S., Lodha, K., Lokken, M., F. Lozano-Rodríguez, C. Magneville, Manera, M., Martini, P., Matthewson, W. L., Aaron Meisner, J. Mena-Fernández, Menegas, A., Mergulhão, T., R Miquel, John Moustakas, Muñoz-Gutiérrez, A., D. Muñoz-Santos, Myers, A. D., S. Nadathur, K Naidoo, L. Napolitano, J. A. Newman, Gustavo Niz, Noriega, H. E., E. Paillas, Palanque-Delabrouille, N., Jiaming Pan, Peacock, J., Ibanez, Marcos Pellejero, Percival, W. J., A. Pérez-Fernández, Pérez-Ràfols, I., M. Pieri, Poppett, C., F. Prada, D. Rabinowitz, Raichoor, A., C. Ramírez-Pérez, M. Rashkovetskyi, Ravoux, C., J. Rich, A. Rocher, Rockosi, C., Rohlf, J., J. O. Román-Herrera, Graziano Rossi, Graziano Rossi, Ruggeri, R., V. Ruhlmann-Kleider, Samushia, L., E Sanchez, Nicole M. Sanders, Daniel Schlegel, M Schubnell, Hee‐Jong Seo, A. Shafieloo, Sharples, R., J. Silber, Sinigaglia, F., Sprayberry, D., T. Tan, G. Tarlé, Taylor, P., Turner, W., L. Arturo Ureña–López, R. Vaisakh, Valdes, F., Georgios Valogiannis, M. Vargas-Magaña, Licia Verde, Walther, M., B. A. Weaver, Weinberg, D. H., Michael J. White, Wolfson, M., Christophe Yèche, Jiaxi Yu, Zaborowski, E. A., Pauline Zarrouk, Zhai, Z., Hanyu Zhang, Gong‐Bo Zhao, Geng Zhao, Rong Zhou, H. Zou · 发表于：Open MIND · 年份：2025 · DOI：10.5281/zenodo.21757919 · 被引用次数：42 · 研究领域：Radio Astronomy Observations and Technology、Astrophysics and Cosmic Phenomena、Scientific Research and Discoveries

The spacetime interval defines a hyperbolic 4-manifold, and that geometry is an exact vacuum solution of Einstein's field equations. Several cosmological anomalies are shown to be artifacts of applying Euclidean geometry to hyperbolically-curved spacetime. Derived from only the age of the universe and geometry, with nothing fitted: • The Hubble constant is predicted at 71.9 km/s/Mpc, landing on the LIGO/Virgo standard-siren central value. The age was measured chronometrically, independently of any cosmological model. • The hyperbolic model fits the Pantheon+ Hubble diagram at 0.910 chi-squared per degree of freedom across 1,580 supernovae with zero adjustable parameters. The independent DES-SN5YR sample, sharing no supernovae with Pantheon+, returns 0.888 to 0.916. Two disjoint surveys, 3,400 supernovae, one geometry, nothing tuned. • On the Hubble tension, the predicted 71.9 lands at the higher of the two standard determinations; the SH0ES value of 73.0 sits 1.1 sigma away, and the framework predicts a leverage factor under 0.2 percent. The direction and size of the split are supplied by the geometry. • Dark energy appears to be where none exists. Fit the standard model to distances generated by this vacuum — an input containing neither dark energy nor matter — and it recovers a dark-energy density of the observed order, returns a matter density of 0.23, and reproduces the DESI evolving dark energy signature inside the published contour, preferred over the standard model by ...