Lambda prior in cosmomc

Use of Cobaya. camb, CLASS, cosmomc, compilers, etc.
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Deepak Vaid
Posts: 7
Joined: May 24 2007
Affiliation: Penn State

Lambda prior in cosmomc

Post by Deepak Vaid » June 11 2007

Is there any way to fix the prior for the cosmological constant in cosmomc. I'm using the parametrization with H and z_re. I thought that fixing z_re might fix lambda but that doesn't seem to work. Any suggestions?

Antony Lewis
Posts: 1941
Joined: September 23 2004
Affiliation: University of Sussex
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Re: Lambda prior in cosmomc

Post by Antony Lewis » June 11 2007

Use a different parameterization that uses Omega_Lambda as a base parameter and then fix it in the input file. (i.e. write your own version of params_CMB for new parameter set)

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