Cosmology with the SPHEREX All-Sky Spectral Survey

TL;DR

SPHEREx is a proposed all-sky spectroscopic satellite designed to explore the universe's origins, galaxy evolution, and potential life-harboring exoplanets through detailed spectral surveys across the entire sky.

Contribution

This paper details the scientific goals, survey design, and systematic effect evaluations for SPHEREx, highlighting its potential for cosmological and extragalactic research.

Findings

Detailed systematic effect evaluations conducted.

Survey design enables comprehensive spectral coverage.

Potential to advance understanding of galaxy evolution and cosmology.

Abstract

SPHEREx (Spectro-Photometer for the History of the Universe, Epoch of Reionization, and Ices Explorer) ( http://spherex.caltech.edu ) is a proposed all-sky spectroscopic survey satellite designed to address all three science goals in NASA's Astrophysics Division: probe the origin and destiny of our Universe; explore whether planets around other stars could harbor life; and explore the origin and evolution of galaxies. SPHEREx will scan a series of Linear Variable Filters systematically across the entire sky. The SPHEREx data set will contain R=40 spectra fir 0.75$<\lambda<$4.1$\mu$m and R=150 spectra for 4.1$<\lambda<$4.8$\mu$m for every 6.2 arc second pixel over the entire-sky. In this paper, we detail the extra-galactic and cosmological studies SPHEREx will enable and present detailed systematic effect evaluations. We also outline the Ice and Galaxy Evolution Investigations.