Summary
How does gravity work on cosmological scales? Starting from July 2023, for the very first time in the history of space science, the geometry of the Universe Large Scales will be mapped by the Euclid mission, providing the scientific community with a wealth of cosmological data of unprecedented quantity and quality. It will be a transformational moment that will open a new ground for testing gravity; yet, unless combined with a theoretical framework able to translate wonderful numbers into concepts, this is bounded to be a missed opportunity. This research program - whose proponent is currently serving in the role of co-Lead of Euclid Theory Working Group - aims at constructing such a framework.
Euclid will compare the action of gravity on light with that on non-relativistic particles, in a regime vastly different from where General Relativity has been confirmed. Any significant detection of a deviation, will have profound consequences. But how to confidently dissect and decipher these potential signals? In the past years I have laid the ground work for cosmological tests of gravity, culminating recently in a first reconstruction of gravity from available data. These results are at their infancy and a leap beyond the current state of the art is urgently required to breach into the smaller, nonlinear scales where statistical errors will be at their lowest. The timing could not be better, with data releases of Euclid expected during the tenure of this proposal.
From an exhaustive exploration of the gravitational landscape under criteria of theoretical viability, we will create predictions of the Large Scales phenomenology by broad classes of theories, with an accuracy that meets Euclid requirements. These will be used to construct a comprehensive phenomenological framework extending into the nonlinear regime and inform bayesian non-parametric reconstructions of gravity from the latest data. As a result, we will provide a completely new view into gravity on Large Scales
Euclid will compare the action of gravity on light with that on non-relativistic particles, in a regime vastly different from where General Relativity has been confirmed. Any significant detection of a deviation, will have profound consequences. But how to confidently dissect and decipher these potential signals? In the past years I have laid the ground work for cosmological tests of gravity, culminating recently in a first reconstruction of gravity from available data. These results are at their infancy and a leap beyond the current state of the art is urgently required to breach into the smaller, nonlinear scales where statistical errors will be at their lowest. The timing could not be better, with data releases of Euclid expected during the tenure of this proposal.
From an exhaustive exploration of the gravitational landscape under criteria of theoretical viability, we will create predictions of the Large Scales phenomenology by broad classes of theories, with an accuracy that meets Euclid requirements. These will be used to construct a comprehensive phenomenological framework extending into the nonlinear regime and inform bayesian non-parametric reconstructions of gravity from the latest data. As a result, we will provide a completely new view into gravity on Large Scales
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More information & hyperlinks
| Web resources: | https://cordis.europa.eu/project/id/101126217 |
| Start date: | 01-09-2024 |
| End date: | 31-08-2029 |
| Total budget - Public funding: | 1 999 219,00 Euro - 1 999 219,00 Euro |
Cordis data
Original description
How does gravity work on cosmological scales? Starting from July 2023, for the very first time in the history of space science, the geometry of the Universe Large Scales will be mapped by the Euclid mission, providing the scientific community with a wealth of cosmological data of unprecedented quantity and quality. It will be a transformational moment that will open a new ground for testing gravity; yet, unless combined with a theoretical framework able to translate wonderful numbers into concepts, this is bounded to be a missed opportunity. This research program - whose proponent is currently serving in the role of co-Lead of Euclid Theory Working Group - aims at constructing such a framework.Euclid will compare the action of gravity on light with that on non-relativistic particles, in a regime vastly different from where General Relativity has been confirmed. Any significant detection of a deviation, will have profound consequences. But how to confidently dissect and decipher these potential signals? In the past years I have laid the ground work for cosmological tests of gravity, culminating recently in a first reconstruction of gravity from available data. These results are at their infancy and a leap beyond the current state of the art is urgently required to breach into the smaller, nonlinear scales where statistical errors will be at their lowest. The timing could not be better, with data releases of Euclid expected during the tenure of this proposal.
From an exhaustive exploration of the gravitational landscape under criteria of theoretical viability, we will create predictions of the Large Scales phenomenology by broad classes of theories, with an accuracy that meets Euclid requirements. These will be used to construct a comprehensive phenomenological framework extending into the nonlinear regime and inform bayesian non-parametric reconstructions of gravity from the latest data. As a result, we will provide a completely new view into gravity on Large Scales
Status
SIGNEDCall topic
ERC-2023-COGUpdate Date
22-11-2024
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