Hi everyone,
I am confused about the neutrino distribution function in CAMB and COSMOMC. So basically, it seems we have two choices:
[math] and a thermal one [math] where [math]
which one is actually used in CAMB and COMSOMC(it looks to me the thermal one) and why? And in COSMOMC why do we need to times [math] to get the [math] but for seterile neutrino we just use [math]
BTW, especially for sterile neutrino, prof S.Pastor argued in arxiv1905.11290v3 that the first disturbution is more accurate than the thermal one. I would like to hear your comments if it uses thermal distribution in CAMB.
Looking forward to your comments!
neutrino distribution

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Re: neutrino distribution
The neutrino model is described in the CAMB notes. meffsterile is defined as in the Planck parameter papers.
Re: neutrino distribution
now I understand. Thanks a lot!