Hi,
I used WMAP3+SDSS data (May 2006 CosmoMC) with a modified scalar power spectrum. When I included the nonlinear effect in the matter power spectrum, nonlinear_pk = T, the chains would run into regimes which give:
mpk chi-sq: -Infinity
Does anyone know what is wrong?
I tried to output the matter power spectrum, and found it is of order 10^{-20}. However, when I turned off the nonlinear option, nonlinear_pk = F, the magnitude of the matter power spectrum is of order 10^4, so I guess the code for the nonlinear effect breaks down for some models?
Thanks.
Loison Hoi
12 Nov 2006
CosmoMC & CAMB: mpk chi-sq = -Infinity
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- Posts: 23
- Joined: February 21 2006
- Affiliation: McGill University
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- Posts: 23
- Joined: February 21 2006
- Affiliation: McGill University
CosmoMC & CAMB: mpk chi-sq = -Infinity
I found that halofit.f90 says that:
Only tested for plain LCDM models with power law initial power spectra
Loison Hoi
14 Nov 2006
Only tested for plain LCDM models with power law initial power spectra
Loison Hoi
14 Nov 2006