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Título: | A Peek Outside Our Universe |
Autor: | Gaztañaga, Enrique CSIC ORCID; Fosalba, Pablo CSIC ORCID | Palabras clave: | Cosmology Dark energy General relativity Black holes |
Fecha de publicación: | 31-ene-2022 | Editor: | Multidisciplinary Digital Publishing Institute | Citación: | Symmetry 14(2): 285 (2022) | Resumen: | According to general relativity (GR), a universe with a cosmological constant Λ, like ours, is trapped inside an event horizon, r<3/Λ−−−√. What is outside? We show, using Israel (1967) junction conditions, that there could be a different universe outside. Our universe looks like a black hole for an outside observer. Outgoing radial null geodesics cannot escape our universe, but incoming photons can enter and leave an imprint on our CMB sky. We present a picture of such a fossil record from the analysis of CMB maps that agrees with the black hole universe predictions but challenges our understanding of the origin of the primordial universe. | Versión del editor: | https://doi.org/10.3390/sym14020285 | URI: | http://hdl.handle.net/10261/259872 | DOI: | 10.3390/sym14020285 | E-ISSN: | 2073-8994 |
Aparece en las colecciones: | (ICE) Artículos |
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