The goal of INFOCW is to tackle two enthralling problems of modern cosmology: the cause of the accelerated expansion and the masses of neutrino particles. Dark energy, a mysterious and predominant component in the universe, is believed to be the driving factor behind its accelerated expansion, challenging our understanding of cosmological physics. Neutrinos, with their undetected mass, also introduce another dimension to the Universe's dark components. As we step into the Euclid satellite era, laden with petabytes of raw data, the INFOCW project aims to address these cosmic conundrums through advanced statistical techniques.
The large-scale distribution of matter in the Universe is not uniform, but forms a complex pattern known as the cosmic web. Low density regions (voids) occupy most of the volume. They are surrounded by sheets from which depart a network of filaments, connected to the densest clusters. Galaxies trace the large-scale structure, mostly made of dark matter, but our understanding of the dark matter-galaxy connection remains incomplete. One of the main goals of INFOCW is to access the untapped information in late-time, non-linear modes.
Placing constraints on fundamental physics requires extracting information from large astronomical data sets with sufficient accuracy and precision. This is a complex problem, since changes to observables when one changes the model away from the standard model are extremely subtle. For the next generation of galaxy surveys, it will be vital to improve upon the various simplifications of the modelling and the inadequate statistical assumptions going into the traditional approach. As a response, the INFOCW project will deliver high-performance information extraction from cosmic web probes. Forward modelling full maps of the cosmic web on massively parallel and/or heterogeneous computer architectures, in combination with high-performance data analysis, represents a new way of building data models, exploiting massive amounts of data, and making the connection with our understanding of the Universe.
The team at the IAP is composed of:
- Florent Leclercq, CNRS researcher, principal investigator
- Guilhem Lavaux, CNRS researcher
- Rémi Fahed, research software engineer
- Clotilde Laigle, astronomer
- Yohan Dubois, CNRS researcher
- Deaglan Bartlett, postdoctoral research associate
- Matthew Ho, postdoctoral research associate
- Tristan Hoellinger, PhD student
Our main collaborators at other institutions are:
- Marc Baboulin (Laboratoire Interdisciplinaire des Sciences du Numérique) — high-performance computing
- Avner Bar-Hen (Conservatoire National des Arts et Métiers) — spatial statistics
- Jens Jasche (Stockholm University) — machine learning and statistical processing
- Alan Heavens (Imperial College London) — Bayesian hierarchical modelling in cosmology
Most members of INFOCW are also members of the Aquila Consortium.
We are currently looking for a master intern and PhD student to start in 2024.
- The Agence Nationale de la Recherche: https://anr.fr
- The Institut d’Astrophysique de Paris: http://www.iap.fr
- The Aquila Consortium: https://www.aquila-consortium.org
- The Euclid mission: https://www.euclid-ec.org
- Follow us on Twitter @LeclercqFlorent and @AquilaScience #INFOCW: https://twitter.com/hashtag/infocw?src=hashtag_click