Project description
Shedding light on dark energy with better cosmic simulations
Scientists are striving to map dark matter and uncover the mystery of dark energy. However, what they are observing through telescopes is not dark matter. It is visible (baryonic) matter, which behaves differently. As such, it can distort data, leading to biases and false tensions. To address this issue, the ERC-funded COLIBRI project aims to create new theoretical models and next-generation hydrodynamical simulations that accurately capture how baryons influence the large-scale structure of the Universe. COLIBRI will deliver the precision needed to interpret data from missions like Euclid, helping cosmologists understand what dark energy really is.
Objective
"Cosmology is entering a new era with revolutionary surveys aimed notably at mapping dark matter and constraining the nature of dark energy. However, the observables are always related to ""visible"" matter (baryons) which is a biased tracer of dark matter. Baryons do not passively follow the assembly of dark matter structures, but they also feedback on the distribution of dark matter, and therefore impact significatively the estimators probing cosmology. If these effects are not precisely taken into account, they induce biases and could potentially engender apparent tensions, some of which are already observed, between the various cosmological surveys and probes. The COLIBRI project proposes to robustly keep under control the effect of baryons on the joint analysis of galaxy lensing and clustering data through i) new theoretical frameworks to capture efficiently the cosmological information content on mildly non-linear scales affected by baryons and ii) novel hydrodynamical simulations accurately resolving baryonic physics inside unprecedentedly large volumes, enabled by innovative simulation techniques and the evolution of computing resources in Europe in the exascale era. These simulations and theoretical schemes will then allow for a robust characterisation of baryons on cosmological scales, in order to interpret current and future large galaxy surveys with enough precision and accuracy. This effort is crucial to make the most out of the rich datasets that will be observed, with in particular the upcoming Euclid’s data releases.
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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. See: The European Science Vocabulary.
This project's classification has been human-validated.
CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques. See: The European Science Vocabulary.
This project's classification has been human-validated.
Keywords
Project’s keywords as indicated by the project coordinator. Not to be confused with the EuroSciVoc taxonomy (Fields of science)
Project’s keywords as indicated by the project coordinator. Not to be confused with the EuroSciVoc taxonomy (Fields of science)
Programme(s)
Multi-annual funding programmes that define the EU’s priorities for research and innovation.
Multi-annual funding programmes that define the EU’s priorities for research and innovation.
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HORIZON.1.1 - European Research Council (ERC)
MAIN PROGRAMME
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Topic(s)
Calls for proposals are divided into topics. A topic defines a specific subject or area for which applicants can submit proposals. The description of a topic comprises its specific scope and the expected impact of the funded project.
Calls for proposals are divided into topics. A topic defines a specific subject or area for which applicants can submit proposals. The description of a topic comprises its specific scope and the expected impact of the funded project.
Funding Scheme
Funding scheme (or “Type of Action”) inside a programme with common features. It specifies: the scope of what is funded; the reimbursement rate; specific evaluation criteria to qualify for funding; and the use of simplified forms of costs like lump sums.
Funding scheme (or “Type of Action”) inside a programme with common features. It specifies: the scope of what is funded; the reimbursement rate; specific evaluation criteria to qualify for funding; and the use of simplified forms of costs like lump sums.
HORIZON-ERC - HORIZON ERC Grants
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Call for proposal
Procedure for inviting applicants to submit project proposals, with the aim of receiving EU funding.
Procedure for inviting applicants to submit project proposals, with the aim of receiving EU funding.
(opens in new window) ERC-2025-STG
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Net EU financial contribution. The sum of money that the participant receives, deducted by the EU contribution to its linked third party. It considers the distribution of the EU financial contribution between direct beneficiaries of the project and other types of participants, like third-party participants.
75794 PARIS
France
The total costs incurred by this organisation to participate in the project, including direct and indirect costs. This amount is a subset of the overall project budget.