The scientists of CosmoStat laboratory are actively involved in the Euclid mission that is a space mission selected by ESA in October 2011 whose launch is planned for 2020. The satellite will be launched by a Soyuz ST-2.1B rocket and then travel to the L2 Sun-Earth Lagrangian point for a 6 years mission.
The Euclid mission that will observe 15,000 deg2 of the sky, aims at mapping the geometry of the dark Universe to address questions related to fundamental physics and cosmology on the nature and properties of dark energy, dark matter and gravity, as well as on the physics of the early universe and the initial conditions which seed the formation of cosmic structures.
Dark energy represents around 75% of the energy content of the Universe today, and together with dark matter it dominates the Universes’ matter-energy content. Both are mysterious and of unknown nature but control the past, present and future evolution of Universe.
The imprints of dark energy and gravity will be tracked by using two complementary cosmological probes to capture signatures of the expansion rate of the Universe and the growth of cosmic structures: Weak gravitational Lensing and Galaxy Clustering (Baryonic Acoustic Oscillations and Redshift Space Distortion).
The mission will investigate the distance-redshift relationship and the evolution of cosmic structures by measuring shapes and redshifts of galaxies out to redshifts ~2, or equivalently to a look-back time of 10 billion years. In this way, Euclid will cover the entire period over which dark energy played a significant role in accelerating the expansion.
The complete survey represents hundreds of thousands images and several tens of Petabytes of data. About 10 billion sources will be observed by Euclid out of which more than 1 billion will be used for weak lensing and several tens of million galaxy redshifts will be also measured and used for galaxy clustering. The scientific analysis and interpretation of these data is led by the scientists of the Euclid Consortium that gathers more than a thousand of members coming from a dozen european countries and from US.
The engineers and astrophysicists of the Service d'Astrophysique are deeply involved in:
SAp and SEDI members of the Euclid Consortium
Amiaux Jérôme, Arcambal Christian, Arnaud Monique, Aussel Hervé, Berthe Michel, Bobin Jérôme, Boulade Olivier, Cara Christophe, Cuillandre Jean-Charles, Daddi Emanuele, Doumayrou Eric, Duc Pierre-Alain, Dumaye Luc, Elbaz David, Fontignie Jean, Gastaud Rene, Goetschy Alain, Herviou Christian, Horeau Benoit, Huynh Duc Dat, Juneau Stephanie, Ketchaso Christian, Kilbinger Martin, Lagage Pierre-Olivier, Leberrurier Frederic, Le Floc'h Emeric, Lehoucq Roland, Lortholary Michel, Martignac Jerome, Moreau Vincent, Morin Bertrand, Motisi Maxime, Mulet Patrick, Nico François, Okumura Koryo, Orduna Thierry, Paulin-Henriksson Stéphane, Pierre Marguerite, Pires Sandrine, Pratt Gabriel, Rassat Anaïs (CEA associate), Renaud Diana, Ronayette Samuel, Sauvage Marc, Starck Jean-Luc, Florent Sureau, Visticot François, Tourette Thierry