Euclid preparation. Sensitivity to neutrino parameters
Matter power spectrum
South Pole Telescope
DOI:
10.48550/arxiv.2405.06047
Publication Date:
2024-05-09
AUTHORS (249)
ABSTRACT
The Euclid mission of the European Space Agency will deliver weak gravitational lensing and galaxy clustering surveys that can be used to constrain standard cosmological model extensions thereof. We present forecasts from combination these on sensitivity parameters including summed neutrino mass $M_\nu$ effective number relativistic species $N_{\rm eff}$ in $\Lambda$CDM scenario a with dynamical dark energy ($w_0 w_a$CDM). compare accuracy different algorithms predicting nonlinear matter power spectrum for such models. then validate several pipelines Fisher matrix MCMC forecasts, using theory codes, numerical derivatives, assumptions concerning non-linear cut-off scale. primary probes alone reach $\sigma(M_\nu)=$56meV $\Lambda$CDM+$M_\nu$ model, whereas CMB data Planck is expected achieve $\sigma(M_\nu)=$23meV raise evidence non-zero at least $2.6\sigma$ level. This pushed $4\sigma$ detection if future LiteBIRD Stage-IV are included. In Planck, also tight constraints $\Delta N_{\rm eff}< 0.144$ (95%CL) $\Lambda$CDM+$M_\nu$+$N_{\rm or 0.063$ when When floating $(w_0, w_a)$, we find remains stable, while degrades most by factor 2. work illustrates complementarity between spectroscopic imaging/photometric constraints. have great potential measuring excluding well-motivated scenarios additional particles.
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