What can cosmic microwave background observations already say about cosmological parameters in Oped and critical-density cold dark matter models?

摘要

We use a combination of the most recent microwave background(CMB) flat-band power mea- surements to place constraints on Hubble's constant h and the total density of the nuiverse Ωo in the context of inflation-based cold dark matter(CDM) models with no cosmological constant. We use X~2 minimization to explore the four-dimensional parameter space having as free parameters, h, Ωo, the power-spectrum slope n, and the power-spectrum normalization at t = 10. Conditioning on Ωo = 1, we obtain h = 0.33±0.08.