CAMB : Transfer function

Use of Cobaya. camb, CLASS, cosmomc, compilers, etc.
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Frederic Vincent
Posts: 4
Joined: July 26 2007
Affiliation: Institut d'Astrophysique de Paris

CAMB : Transfer function

Post by Frederic Vincent » July 26 2007

Hi,

Thank you for your quick answer this morning!
I have another question regarding the transfer functions in transfer_out.dat
In the answer to a previous email (dated March 13 2007) I see that the 2->7 columns of transfer_out.dat are the transfer functions divided by k^2. However, when I plot the columns as if they were the transfer functions (i.e. not divided by k^2) I find the correct power spectrum. So I wonder whether the columns are T(k) or T(k)/k^2.

Thanks a lot,

Frederic

Antony Lewis
Posts: 1941
Joined: September 23 2004
Affiliation: University of Sussex
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Re: CAMB : Transfer function

Post by Antony Lewis » July 26 2007

They are \Delta_i/k^2 - so flat on super-horizon scales.

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