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BBN in cosmomc
 
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Laurence Lewis



Joined: 09 Oct 2007
Posts: 2
Affiliation: James Madison University
PostPosted: October 09 2007  Reply with quote
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
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Anze Slosar



Joined: 24 Sep 2004
Posts: 195
Affiliation: Brookhaven National Laboratory
PostPosted: October 09 2007  Reply with quote
calclike.f90: if (Use_BBN) GetLogLikePost = GetLogLikePost + (CMB%ombh2 - 0.022)**2/(2*0.002**2)
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Laurence Lewis



Joined: 09 Oct 2007
Posts: 2
Affiliation: James Madison University
PostPosted: October 10 2007  Reply with quote
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
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kumar pandey



Joined: 26 Nov 2008
Posts: 3
Affiliation: Inter University Centre for Astronomy and Astrophysics
PostPosted: November 27 2008  Reply with quote
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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