Cosmology at high redshift — a probe of fundamental physics. Issue 12 (21st December 2021)

• Record Type: Journal Article
• Authors: Sailer, Noah; Castorina, Emanuele; Ferraro, Simone; White, Martin
• Is Part Of: Journal of cosmology and astroparticle physics. Volume 2021:Issue 12(2021)
• Publication Date: 2021-12-21
• Subjects: cosmological parameters from LSS -- cosmological perturbation theory -- gravitational lensing -- redshift surveys; Cosmology -- Periodicals; Astrophysics -- Periodicals; 523.0105
• DOI: 10.1088/1475-7516/2021/12/049
• Languages: English
• ISSNs: 1475-7516

Abstract

Abstract: An observational program focused on the high redshift (2<z<6) Universe has the opportunity to dramatically improve over upcoming LSS and CMB surveys on measurements of both the standard cosmological model and its extensions. Using a Fisher matrix formalism that builds upon recent advances in Lagrangian perturbation theory, we forecast constraints for future spectroscopic and 21-cm surveys on the standard cosmological model, curvature, neutrino mass, relativistic species, primordial features, primordial non-Gaussianity, dynamical dark energy, and gravitational slip. We compare these constraints with those achievable by current or near-future surveys such as DESI and Euclid, all under the same forecasting formalism, and compare our formalism with traditional linear methods. Our Python code FishLSS — used to calculate the Fisher information of the full shape power spectrum, CMB lensing, the cross-correlation of CMB lensing with galaxies, and combinations thereof — is publicly available.