Joined: 26 Feb 2016
Affiliation: BITS Pilani
|Posted: February 28 2016
|I am sorry if this is a trivial question, but I am new to CAMB and I am trying to figure out the transfer function output file.
One output file generated is the output_root_transfer.dat, which contains transfer functions for various quantities.
The CAMB readme says that the columns contain:
k/h , Δ / k2 and so on...
My query is, how do I get the power spectrum from these values?
If the second column has Δ/k2, I thought multiplying by k2 would get me Δ, and then squaring it would give me the dimensionless power spectrum, from which I can get the power spectrum:
P(k) = 2π2 Δ2 / k3
However, this does not seem to generate the well-known shape of the power spectrum.
Any help on what exactly the output file contains would help me a great deal.