Hi everybody
Default parameters in CAMB include 'massive_neutrinos = 0' and consequently 'omnuh2 = 0' from which CMB spectrum fits pretty well WMAP data. you can check my params.ini
I just changed 'massive_neutrinos = 3', but mantain 'omnuh2 = 0', which should mean effectively massless neutrinos. I was expecting to obtain a very similar CMB spectrum, but am surprised to find that the change is quite significative. You can see it neu.eps. It has nothing to do with 'massive_nu_approx' parameter
Why do they differ that much?
Maybe naively, this could seem to be an inconsistency. I would appreciate your comments. Thanks
non expected discrepancy between CMB curves
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Re: non expected discrepancy between CMB curves
What did you set for massless_neutrinos ?