Euclid and the origin of the accelerating universe

21/03/2017 - 14:00 - 15:00
IAG - Prédio Principal, Auditório 2

Euclid and the origin of the accelerating universe


Yannick Mellier

Euclid Consortium Lead - Institut d'Astrophysique de Paris and CEA/IRFU/Service d'Astrophysique in Saclay


Euclid is a space-based optical/near-infrared survey mission of the European Space Agency (ESA) designed to investigate the nature of dark energy, dark matter and gravity by observing their signatures on the geometry of the Universe and on the formation of large structures over cosmological timescales. The mission is scheduled for a launch date in the second half of 2020.

Euclid will use two main techniques in the detection of the signature of dark matter and energy: Weak gravitational Lensing, which requires the measurement of the shape of distant galaxies from Euclid space imaging data and photometric redshifts of these galaxies from space- and ground- based photometric data, and Galaxy Clustering (Baryon Acoustic Oscillations and Redshift Space Distortion), based on the measurement of the 3-dimensional distribution of galaxies through their spectroscopic redshifts. 

Euclid will explore how the Universe evolved over the past 10 billion years 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 structure.

During this seminar I will present an overview of the mission covering the scientific targets (cosmology and fundamental physics), the technical challenges (platform, instruments and ground segment) and the complex programmatic issues of this ambitious project.