camb, negative dtauda in equations.f90

Use of Cobaya. camb, CLASS, cosmomc, compilers, etc.
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Rockhee Sung
Posts: 5
Joined: November 13 2007
Affiliation: University of Cape Town

camb, negative dtauda in equations.f90

Post by Rockhee Sung » March 11 2011

Hi there,

I was wondering if someone has same doubt in camb.

As given some parameter range, dtauda or say grhoa2 or H^2 a^4 has negative values ,however, it does "not" make problem while it used for the integration for Angular diameter distance or Age of universe.

I think, if the parameter range gives negative dtauda at certain area it should have to be ruled out , otherwise age of universe which is calculated from dtauda cannot be correct..

Any thought?

Rockhee

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