CAMB: Running of the spectral index

Use of Healpix, camb, CLASS, cosmomc, compilers, etc.
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Konstantinos Tzirakis
Posts: 1
Joined: February 17 2006
Affiliation: S.U.N.Y. at Buffalo

CAMB: Running of the spectral index

Post by Konstantinos Tzirakis » May 03 2006

Hi,

If I assume a NON constant running of the spectral index (dn/dlnk<0 for the first 5 efolds for example and then dn/dlnk=0), how can I modify CAMB in order to get the Cl's?

Thanks!

Antony Lewis
Posts: 1498
Joined: September 23 2004
Affiliation: University of Sussex
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Re: CAMB: Running of the spectral index

Post by Antony Lewis » May 03 2006

You'd have to edit power_tilt.f90 to implement whatever initial power spectrum you like instead of the default.

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