Living Reviews in Relativity: "Cosmology and fundamental physics with the Euclid satellite" (Update)

© SpringerAmendola, L. et al. (The Euclid Theory Working Group), "Cosmology and fundamental physics with the Euclid satellite", Living Rev Relativ (2018) 21: 2.​​​​​​​

Open Access | Review Article

First Online: 12 April 2018

Major revision, updated and expanded.


Euclid is a European Space Agency medium-class mission selected for launch in 2020 within the cosmic vision 2015–2025 program. The main goal of Euclid is to understand the origin of the accelerated expansion of the universe. Euclid will explore the expansion history of the universe and the evolution of cosmic structures by measuring shapes and red-shifts of galaxies as well as the distribution of clusters of galaxies over a large fraction of the sky. Although the main driver for Euclid is the nature of dark energy, Euclid science covers a vast range of topics, from cosmology to galaxy evolution to planetary research. In this review we focus on cosmology and fundamental physics, with a strong emphasis on science beyond the current standard models. We discuss five broad topics: dark energy and modified gravity, dark matter, initial conditions, basic assumptions and questions of methodology in the data analysis. This review has been planned and carried out within Euclid’s Theory Working Group and is meant to provide a guide to the scientific themes that will underlie the activity of the group during the preparation of the Euclid mission.


Major revision, updated and expanded. Seven new figures were added. About 300 new references have been cited. Forecasts are not updated in this version, with respect to 2012.