CAMB Matter Power Spectrum

Use of Healpix, camb, CLASS, cosmomc, compilers, etc.
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Abhirup Datta
Posts: 6
Joined: January 22 2008
Affiliation: New Mexico Tech

CAMB Matter Power Spectrum

Post by Abhirup Datta » January 23 2008

Hi

I am using the CAMB package to get the matter power spectrum. The output file 'test_matterpower.dat' seems to have matter power spectrum as a function of k/h . But what are the units of Matter Power Spectrum and the k-value?

I am used to seeing the power spectrum in the EoR papers in mK^2 and the k in Mpc^-1.

Thanks
Abhi

Antony Lewis
Posts: 1501
Joined: September 23 2004
Affiliation: University of Sussex
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Re: CAMB Matter Power Spectrum

Post by Antony Lewis » January 23 2008

everything in matterpower is in Mpc/h units.

Abhirup Datta
Posts: 6
Joined: January 22 2008
Affiliation: New Mexico Tech

CAMB Matter Power Spectrum

Post by Abhirup Datta » January 23 2008

Is there a normalization constant involved in converting this to the scale of mK or Jansky (as seen in most of the literature) ??

Thanks
Abhi

Antony Lewis
Posts: 1501
Joined: September 23 2004
Affiliation: University of Sussex
Contact:

Re: CAMB Matter Power Spectrum

Post by Antony Lewis » January 23 2008

How the power spectrum of the linear dark matter perturbations relates to any given observable is not generally obvious. If you are asking about 21cm I suggest you read astro-ph/0608032.

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