BBN in cosmomc

Use of Healpix, camb, CLASS, cosmomc, compilers, etc.
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Laurence Lewis
Posts: 2
Joined: October 09 2007
Affiliation: James Madison University

BBN in cosmomc

Post by Laurence Lewis » October 09 2007

I am looking to play around with the BBN values in cosmomc. They seem to be hard coded. Can anyone please point in the direction of their location? Thanks!

Cheers
Laurence

Anze Slosar
Posts: 183
Joined: September 24 2004
Affiliation: Brookhaven National Laboratory
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BBN in cosmomc

Post by Anze Slosar » October 09 2007

calclike.f90: if (Use_BBN) GetLogLikePost = GetLogLikePost + (CMB%ombh2 - 0.022)**2/(2*0.002**2)

Laurence Lewis
Posts: 2
Joined: October 09 2007
Affiliation: James Madison University

BBN in cosmomc

Post by Laurence Lewis » October 10 2007

I obtained the same instance when I greped 'BBN' in the source. I was curious if there were any other instances of it in the code from which I could alter its values? Thank you


Laurence

kumar pandey
Posts: 3
Joined: November 26 2008
Affiliation: Inter University Centre for Astronomy and Astrophysics

BBN in cosmomc

Post by kumar pandey » November 27 2008

Hi There,
I am new to CosmoMC, but it looks great!
I have been asked to reproduce WMAP5 + BAO results (Percival et al 2007).
My only problem is that i am not sure in which form i have to include the likelihood.

Let me explain my problem: −2lnL = X−1 V−1 X

Now when i add this to calclike.f90 i have

if (use_percival)
GetLogLikePost = GetLogLikePost + X−1 V−1 X
end if

Is it correct? Or i have to use X−1 V−1 X /2


Looking forward to hearing from you :)


http://cosmocoffee.info/viewtopic.php?t=1276

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