CosmoCoffee

[jesus edel]

As we ask, If I am right the evolution of CAMB is separated into two parts for k, in the subrutine CalcScalarSources and GetTransfer. Studying the code I have seen that the evolution into the GetTransfer subrutine only take two points in tau, from de initial condition until today. Why is this??

[Antony Lewis]

CalcScalarSources is for the CMB angular power spectra, GetTransfer is for the matter power spectrum (and related outputs) [by default only evaluated today].

[jesus edel]

But in CalcScalarSources the evolution is taken on steps of tau given for TimeSteps%points from tau_start= GetTauStart(EV%q)
to CP%tau0. In another hand in GetTransfer only is taken two points in tau, tau_start=GetTauStart and tautf, not intermediate points.