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N-point statistics as a bridge between cosmological observations and the underlying physics

Description du projet

Signatures primordiales sur notre toile cosmique à grande échelle

Le modèle standard de la cosmologie s’efforce d’expliquer l’évolution et le contenu de notre Univers, mais des questions importantes demeurent sans réponse. Les données nécessaires pour combler certaines de ses lacunes pourraient résider dans la structure à grande échelle de l’Univers, qui représente des modèles bien plus vastes qu’une galaxie ou que des groupes de galaxies. Les processus physiques qui façonnent cette structure ont tous laissé leur «empreinte» sur le modèle d’amas très précis à différentes échelles. Fort du soutien du programme Actions Marie Skłodowska-Curie, le projet Cosmo-Bridge exploitera les statistiques avancées pour faire le lien entre les observables et la physique sous-jacente. Ces nouvelles méthodes d’analyse contribueront aux prochaines études de galaxies de grand volume, afin de maximiser le potentiel de découverte.

Objectif

Over the last decades, we have established a standard cosmological paradigm by combining the information from complementary cosmological probes. However, many intriguing questions remain to be answered: the nature of dark energy, the driving mechanisms of the cosmic inflation, and masses of neutrinos. In this proposal, I will focus on the cosmological information content of the large-scale structure (LSS) of the Universe. Different physical processes leave their unique imprints on the clustering pattern of LSS at different scales, and N-point statistics act a bridge between the observables and the underlying physics. In the coming years, new large-volume galaxy surveys will probe the LSS of the Universe with exquisite detail. However, traditional analysis methods, based mostly on 2-point statistics alone, are not adequate for these new surveys and must urgently be revised to ensure their full potential. This proposal aims to maximise the information to be extracted from the upcoming surveys. With the Marie-Curie fellowship, I will carry out a consistent joint analysis of the 2- and 3-point statistics, and develop a complementary but simplified treatment of the N-point statistics. These tools will be applied to the new data to constrain the cosmological models, with special focus in understanding the properties of the primordial signatures and models beyond the standard cosmological paradigm. In the outgoing phase, I will work at Univesity of Florida (US) to benefit from the expertise in the leading algorithms to estimate higher-order statistics, their theoretical modelling, and knowledge about high-performance computing. In the incoming phase, I will work at the Max Planck Institute for Extraterrestrial Physics (Germany), I will delve into the data from the real surveys and understand potential systematic errors. With the help of the experts at MPE, the experience and techniques acquired in the US will be applied to the datasets to extract more precise information.

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Coordinateur

MAX-PLANCK-GESELLSCHAFT ZUR FORDERUNG DER WISSENSCHAFTEN EV
Contribution nette de l'UE
€ 264 669,12
Adresse
Hofgartenstrasse 8
80539 Munchen
Allemagne

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Région
Bayern Oberbayern München, Kreisfreie Stadt
Type d’activité
Research Organisations
Liens
Autres sources de financement
€ 0,00

Partenaires (1)