Project

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Euclid: high-precision cosmology in the dark sector

Applicant Courbin Frédéric
Number 198674
Funding scheme Sinergia
Research institution Laboratoire d'astrophysique Observatoire de Sauverny EPFL - SB - IPEP - LASTRO
Institution of higher education EPF Lausanne - EPFL
Main discipline Interdisciplinary
Start/End 01.09.2021 - 31.08.2025
Approved amount 2'899'827.00
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All Disciplines (6)

Discipline
Interdisciplinary
Information Technology
Electrical Engineering
Theoretical Physics
Astronomy, Astrophysics and Space Sciences
Mathematics

Keywords (11)

Galaxy Formation and Evolution; Space; High Performance Computing; Cosmology; Dark Energy; Dark Matter; Machine Learning; Data Science; Weak Lensing; Informatics; Mathematics

Lay Summary (French)

Lead
Ce projet interdisciplinaire s'organise autour de la mission spatiale Euclid de l'ESA, dont le lancement est prévu pour fin 2022. Il couvre la période 2021-2025, donc la période la plus interessante: celle du lancement. Elle se fonde sur l'expertise développée en Suisse grâce à la mission Planck et sur plusieurs décennies de recherches qui ont abouties à l'adoption de la mission Euclid par l'ESA en 2011.
Lay summary
Le satellite Euclid va dresser une carte optique et infrarouge de 15'000 degrés carrés du ciel extragalatique, soit plus de 2 milliards de galaxies, dont des spectres infrarouges seront aussi obtenus pour 50 millions d'entre elles. Ces données permettront d'implémenter efficacement plusieurs sondes cosmologiques complémentaires telles que les Oscillations Accoustique Baryoniques, les distorsions dans l'espace des redshifts, les amas de galaxies, l'effet Sachs-Wolfe et l'effet de lentille gravitationnelle faible. Les implication cosmologiques seront d'une valeur unique pour plusieurs générations d'astrophysiciens et de cosmologistes.

Euclid est la première mission spatiale entièrement dédiée à retracer l'histoire de la formation et de l'expansion de l'univers, en testant la possibilité que son expansion accélérée est due à une forme encore inconnue d'énergie sombre et/ou la validité de la théorie de la relativité générale sur des très grandes échelles spatiales. L'Europe et la Suisse ont la chance de participer à cette mission sans précédent et de diriger certains aspects des recherches, avec potentiellement un impact profond sur la physique "au delà" du modèle standard. 



Direct link to Lay Summary Last update: 09.12.2020

Responsible applicant and co-applicants

Employees

Project partner

Associated projects

Number Title Start Funding scheme
167158 Machine Learning based Analytics for Big Data in Astronomy 01.07.2017 NRP 75 Big Data
176996 Going Beyond the Power Spectrum in Large-Scale Surveys 01.07.2018 SNSF Professorships
172712 COSMOGRAIL: Cosmology with Time Delays in Gravitationally Lensed Quasars 01.06.2017 Project funding (Div. I-III)
173716 Euclid: high-precision cosmology in the dark sector 01.06.2017 Sinergia
190708 Robust Digital Signing with Deep Neural Networks 01.01.2020 Spark
173716 Euclid: high-precision cosmology in the dark sector 01.06.2017 Sinergia
200463 Strong Gravitational Lensing With Wide-Field and Time-Domaine Surveys 01.06.2021 Project funding (Div. I-III)

Abstract

This interdisciplinary SINERGIA proposal is intended to fund Swiss scientific activities around the ESA Euclid cosmology mission, scheduled for launch in 2022. It covers the crucial launch period 2021-2025 and capitilizes both on the Swiss expertise in the Planck CMB experiment and on the decade of efforts that led to the adoption of Euclid by ESA in 2012 as its next key cosmology mission. The Euclid satellite will survey 15'000 square degree of sky with wide-field optical and near-IR cameras and a near-IR spectrograph, providing the images of 2 billion galaxies and spectra for 50 million of them with unprecedented quality. The data will provide the platform to implement several complementary cosmological probes including Baryonic Accoustic Oscillations (BAO), Redshift Space Distortion (RSD), galaxy cluster number counts, the Integrated Sachs-Wolfe (ISW) effect, and weak gravitational lensing. Not only will the cosmological implications be ground-breaking, but the legacy value of the Euclid data will provide an invaluable virtual observatory for generations of astrophysicists and cosmologists.Euclid is the first space-based mission to address the issue of the observed acceleration of the expansion of the universe. It will tackle the question of whether there exists a form of repulsive dark energy accounting for nearly 70% of the total energy of the universe or that General Relativity may not be the correct theory of gravity on large scales. Europe and Switzerland have the privilege to lead this mission, with profound impact on cosmology, astrophysics and physics beyond the standard model.Our project is based on a previous SINERGIA Euclid grant obtained for the preparation of the mission. It covers a wide range of expertise, in theoretical physics, astrophysics, cosmology, High Performance Computing (HPC), computer architecture, mathematics and electrical engineering, spread over 4 nodes at EPFL, UniGE, UniZH, FHNW. Switzerland is developing a hardware component and ground-segment activities for Euclid through two separate Prodex programs of the Confederation and ESA (PI: Paltani, UniGE). This SNSF SINERGIA proposal is a necessary complement to the Prodex ground-segment program, which cannot cover the more scientific aspects, like algorithm development and processing and analysis of the real data. It also comes at the most exciting time of the mission, i.e. its launch in 2022, along with the first data acquisition and therefore first concrete scientific results!
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