Heavy Neutrinos in CAMB

Use of Healpix, camb, CLASS, cosmomc, compilers, etc.
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Devin Walker
Posts: 4
Joined: September 06 2009
Affiliation: SLAC

Heavy Neutrinos in CAMB

Post by Devin Walker » September 06 2009

Hi Anthony & others,

I have downloaded CAMB and want to get a feel for the program by adding hypothetical heavy neutrinos with a 1 MeV sized mass. This does not seem possible from the params.ini file.

Can you point me in the right direction? I appreciate you time.


Antony Lewis
Posts: 1596
Joined: September 23 2004
Affiliation: University of Sussex

Re: Heavy Neutrinos in CAMB

Post by Antony Lewis » September 08 2009

The code assumes neutrinos are relativistic when the initial conditions are set up, so it may take some changes to make things work if that is not the case. It also assumes the neutrino density is related to the photon density by the usual relation, so if you want to do sterile neutrinos that would also require changes.

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