Constraints on the curvature of the Universe and dynamical dark energy from the full-shape and BAO dataстатья
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Аннотация:We present limits on the parameters of the oΛCDM, w0CDM, and w0waCDM models obtained from the joint analysis of the full-shape, baryon acoustic oscillations (BAO), big bang nucleosynthesis (BBN) and supernovae data. Our limits are fully independent of the data on the cosmic microwave background (CMB) anisotropies, but rival the CMB constraints in terms of parameter error bars. We find the spatial curvature consistent with a flat universe Ωk; the dark-energy equation of state parameter w0 is measured to be w0, consistent with a cosmological constant. This conclusion also holds for the time-varying dark energy equation of state, for which we find w0 and wa. The exclusion of the supernovae data from the analysis does not significantly weaken our bounds. This shows that using a single external BBN prior, the full-shape and BAO data can provide strong CMB-independent constraints on the nonminimal cosmological models.