# 4MOST Consortium Survey 8: Cosmology Redshift Survey (CRS)

## TL;DR

The 4MOST CRS aims to perform precise cosmological tests using spectroscopic measurements of 8 million galaxies and quasars across a wide redshift range, complementing other major surveys and facilities.

## Contribution

This survey provides a large, carefully selected spectroscopic dataset to test gravitational physics and cosmological models in synergy with other major observational projects.

## Key findings

- High-precision clustering measurements across redshifts
- Complementary data for gravitational physics tests
- Enhanced understanding of cosmic structure formation

## Abstract

The 4MOST Cosmology Redshift Survey (CRS) will perform stringent cosmological tests via spectroscopic clustering measurements that will complement the best lensing, cosmic microwave background and other surveys in the southern hemisphere. The combination of carefully selected samples of bright galaxies, luminous red galaxies, emission-line galaxies and quasars, totalling about 8 million objects over the redshift range $z = 0.15$ to $3.5$, will allow definitive tests of gravitational physics. Many key science questions will be addressed by combining CRS spectra of these targets with data from current or future facilities such as the Large Synoptic Survey Telescope, the Square Kilometre Array and the Euclid mission.

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Source: https://tomesphere.com/paper/1903.02474