Cosmology with large redshift surveys

TL;DR

Galaxy redshift surveys are crucial for understanding dark energy, dark matter, and galaxy evolution, with new surveys like JPAS offering innovative multi-filter techniques for comprehensive sky mapping.

Contribution

The paper discusses the significance of redshift surveys in cosmology and introduces the JPAS survey with a novel 56-filter system for detailed sky mapping.

Findings

JPAS will map ~8000 sq. degrees with 56 filters.

JPAS provides accurate photometric redshifts and low-resolution spectra.

Redshift surveys are vital for multiple astrophysical and cosmological studies.

Abstract

Galaxy redshift surveys are a major tool to address the most challenging cosmological problems facing cosmology, like the nature of dark energy and properties dark matter. The same observations are useful for a much larger variety of scientific applications, from the study of small bodies in the solar system, to properties of tidal streams in the Milky Way halo, to galaxy formation and evolution. Here I briefly discuss what is a redshift survey and how it can be used to attack astrophysical and cosmological problems. I finish with a brief description of a new survey, the Javalambre Physics of the Accelerating Universe Astrophysical Survey (JPAS), which will use an innovative system of 56 filters to map ~8000 square degrees on the sky. JPAS photometric system, besides providing accurate photometric redshifts useful for cosmological parameter estimation, will deliver a low-resolution spectrum at each pixel on the sky, allowing for the first time an almost all-sky IFU science.