Project description
Exploring voids for precision cosmology
Cosmology explores fundamental questions about the universe, revealing insights into its structure and behaviour. Observations indicate accelerated expansion attributed to dark energy. Large-scale surveys of galaxy distribution, such as the ESA’s Euclid mission, provide precise measurements and insights into void cosmology. The properties of voids offer a new way to analyse cosmological parameters and test general relativity. The ERC-funded COSMOBEST project will investigate voids as a reliable tool for addressing the mysteries of modern cosmology. Specifically, the project focuses on techniques that do not require extensive calibration and will effectively control for systematics. It will use modern data, positioning Europe as a global leader in providing constraints on dark energy, neutrinos, and general relativity from the next generation of surveys.
Objective
Cosmology addresses the fundamental questions about our Universe: what is it made of? how does it evolve? Observations suggest that the Universe is undergoing an accelerated expansion---to explain it, cosmologists hypothesize the existence of a mysterious component: dark energy. Despite major recent advances in the field, up to now traditional methods in cosmological analysis have failed to provide a throughout understanding of dark energy. Large-scale surveys, mapping the distribution of billions of galaxies in the Universe, allow us to look back in time and encompass the era when dark energy rises: they are a powerful tool to address our fundamental questions. The next generation of surveys, and in particular the ESA Euclid mission, will map the Universe with high-quality measurements reaching unprecedented precision; they will sample the galaxy distribution in detail also in the emptier regions with fewer galaxies: voids. Void cosmology is in its golden age, and constitutes nowadays an increasingly active sector of galaxy clustering analysis: by measuring void properties we obtain stringent constraints on cosmological parameters. Voids allow to perform a novel and independent analysis of large-scale structure data, bringing us in the regime of COSMOlogy BEyond Standard Techniques. Voids are extremely sensitive to the properties of dark energy and neutrinos, and are a powerful tool to test general relativity in a new regime. COSMOBEST is an ambitious ERC program aiming to exploit voids as a novel and robust tool to shed light on the puzzles of modern cosmology. It capitalizes on the PI's wide experience in building void science in large collaborations, with a strong focus on calibration-free techniques and systematics control. With COSMOBEST I will lead void analysis from modern data, guaranteeing for Europe a worldwide leadership in delivering constraints on dark energy, neutrinos and general relativity from the next generation of surveys.
Fields of science (EuroSciVoc)
CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques.
CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques.
- natural sciencesphysical sciencestheoretical physicsparticle physicsneutrinos
- natural sciencesphysical sciencesastronomyphysical cosmology
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Programme(s)
- HORIZON.1.1 - European Research Council (ERC) Main Programme
Topic(s)
Funding Scheme
HORIZON-ERC - HORIZON ERC GrantsHost institution
75794 Paris
France