An observational program focused on the high redshift (2<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.
Cosmology at high redshift -- a probe of fundamental physics / N. Sailer, E. Castorina, S. Ferraro, M. White. - (2021 Jun 17).
|Titolo:||Cosmology at high redshift -- a probe of fundamental physics|
|Parole Chiave:||astro-ph.CO; astro-ph.CO|
|Settore Scientifico Disciplinare:||Settore FIS/05 - Astronomia e Astrofisica|
|Data di pubblicazione:||2021-06-17|
|Appare nelle tipologie:||24 - Pre-print|