[Paper Review] Euclid. I. Overview of the Euclid mission

Euclid Collaboration, Y. Mellier+1138 more|SPIRE - Sciences Po Institutional REpository|May 22, 2024

Historical Astronomy and Related Studies32 citations

TL;DR

This paper provides an overview of the Euclid mission, introducing its goals, scope, and collaborative framework as the first in a multi-part series.

ABSTRACT

The current standard model of cosmology successfully describes a variety of measurements, but the nature of its main ingredients, dark matter and dark energy, remains unknown. Euclid is a medium-class mission in the Cosmic Vision 2015-2025 programme of the European Space Agency (ESA) that will provide high-resolution optical imaging, as well as near-infrared imaging and spectroscopy, over about 14,000 deg^2 of extragalactic sky. In addition to accurate weak lensing and clustering measurements that probe structure formation over half of the age of the Universe, its primary probes for cosmology, these exquisite data will enable a wide range of science. This paper provides a high-level overview of the mission, summarising the survey characteristics, the various data-processing steps, and data products. We also highlight the main science objectives and expected performance.

Motivation & Objective

• Present an overview of the Euclid mission and its scope.
• Identify the collaboration network and participating institutions.
• Lay out the structure and goals for subsequent papers addressing Euclid science.

Proposed method

• Describe the mission architecture and scientific aims at a high level.
• Summarize organizational structure and key collaborators/institutions.
• Outline the series' progression and the role of subsequent papers in detailing Euclid science.

Figure 1: Comparison of the number of redshifts and comoving volume covered by various previous and ongoing spectroscopic surveys against the predictions for Euclid (see text for details). The grey lines show lines of constant number density as labelled.

Experimental results

Research questions

• RQ1 What are the primary goals and scope of the Euclid mission?
• RQ2 Who are the major collaborators and institutions involved in Euclid?
• RQ3 How is the Euclid science program structured across a series of papers?

Key findings

• Euclid is presented as a mission with a defined scope and collaborative framework.
• A broad set of institutions and partners across multiple countries are involved.
• This paper serves as the introductory overview in a multi-part documentation of Euclid science.

Figure 2: Measured galaxy power spectrum multipoles calculated from dedicated mocks (Pezzotta et al. in prep.) based on the Flagship simulation (see Sect. 6.1 ) of the Euclid emission-line sample for a redshift bin $1.3<z<1.5$ , compared to a best-fit model based on effective field theory (EFT, also