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- W2152616369 abstract "Using an approximate likelihood method adapted to band--power estimates, we analyze the ensemble of first generation cosmic microwave background anisotropy experiments to deduce constraints over a six--dimensional parameter space describing Inflation--generated adiabatic, scalar fluctuations. The basic preferences of simple Inflation scenarios are consistent with the data set: flat geometries $(OmT equiv 1-Omk sim 1)$ and a scale--invariant primeval spectrum ($nsim 1$) are favored. Models with significant negative curvature ($OmT < 0.7$) are eliminated, while constraints on postive curvature are less stringent. Degeneracies among the parameters prevent independent determinations of the matter density $OmM$ and the cosmological constant $Lambda$, and the Hubble constant $Ho$ remains relatively unconstrained. We also find that the height of the first Doppler peak relative to the amplitude suggested by data at larger $l$ indicates a high baryon content ($Omb h^2$), almost independently of the other parameters. Besides the overall qualitative advance expected of the next generation experiments, their improved dipole calibrations will be particularly useful for constraining the peak height. Our analysis includes a {em Goodness--of--Fit} statistic applicable to power estimates and which indicates that the maximum likelihood model provides an acceptable fit to the data set." @default.
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- W2152616369 date "2000-04-19" @default.
- W2152616369 modified "2023-09-27" @default.
- W2152616369 title "Cosmological Constraints from the Cosmic Microwave Background" @default.
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