Cosmomc May 10th version

Use of Cobaya. camb, CLASS, cosmomc, compilers, etc.
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Ido Ben-Dayan
Posts: 5
Joined: July 08 2010
Affiliation: Ben-Gurion University
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Cosmomc May 10th version

Post by Ido Ben-Dayan » July 08 2010

I'm of course new to this software, and a novice in numerical calculations in general.

I tried running cosmomc roughly and check whether the spectral index and its running (n_s, n_{run}) converge to the values quoted in WMAP papers.
We are especially interested in a range which is larger than the standard constraints, and check that the convergence is the same.
I tried to run several parameter value sets
For exmaple one of them was:
parameter start min max start width st. dev.
n_s 0.95 0.5 1.5 0.02 0.02
n_run 0 -2 2 0.1 0.1

k_pivot=0.05 or 0.002
The runs terminated after a few iterations. I thought that this is close enough to the WMAP values so it should converge.

Thanks in advance,
Ido.

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