Likelihood distribution for models with cosmological constant from COBE data

Details Likelihood distribution for models with cosmological constant from COBE data Likelihood distribution for models with cosmological constant from COBE data

2001-06-25

arxiv.org/abs/astro-ph/0106446v3

Astronomy and Astrophysics

Astrophysics

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

Scientific paper

10.1086/322066

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 $\Omega_\Lambda$.

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