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Why the evolution in CAMB is separated into two regions in the k-space?
 
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jesus edel



Joined: 09 May 2012
Posts: 4
Affiliation: IFUNAM

PostPosted: January 12 2013  Reply with quote

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??
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Antony Lewis



Joined: 23 Sep 2004
Posts: 872
Affiliation: University of Sussex

PostPosted: January 14 2013  Reply with quote

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



Joined: 09 May 2012
Posts: 4
Affiliation: IFUNAM

PostPosted: January 17 2013  Reply with quote

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.
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