Massive neutrinos in cosmology: geometry and growth of structures
DOI:
https://doi.org/10.47456/Cad.Astro.v7n1.51840Keywords:
cosmology, neutrinos, geometry, growth of large-scale structureAbstract
Neutrinos are the most abundant particles in the Universe after photons, yet their masses remain unknown. In this article we show how modern cosmology provides a powerful way to investigate this fundamental property through the Cosmic Microwave Background, baryon acoustic oscillations, and the growth of large-scale structure. We discuss how neutrinos, relativistic in the early Universe and non-relativistic at late times, leave imprints both on the expansion history and on the formation of the cosmic web. We also show how recent galaxy survey data, such as DESI, combined with cosmological simulations, allow increasingly precise constraints on the sum of neutrino masses, turning the Universe into a powerful detector of these particles.
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