Likelihood distribution for models with cosmological constant from COBE data

Abstract

Using COBE-DMR 4-year data, we find a general expression yielding the likelihood distribution in the 3-dimensional parameter space spanned by the spectral index $n$, the spectral amplitude $a_{10}$ and the false-vacuum density parameter ${\Omega }_{\Lambda }$. Using such simple expression, the range of possible normalizations, within a given likelihood interval from top-likelihood normalization, is readily found, with fair approximation, for any model with total density parameter ${\Omega }_o=1$ and assigned $n$ and ${\Omega }_{\Lambda }$.

19 pages, 7 figures. Added references. Accepted for publication in ApJ

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Cited by in corpus (1)

• Foregrounds for observations of the cosmological 21 cm line: I. First Westerbork measurements of Galactic emission at 150 MHz in a low latitude field