CAMB: scale factor and adotrad
Posted: December 05 2018
Hi.
I want to know reference about exact relation between scale factor and conformal time.
In subroutine initial, a=tau*adotrad*(1+omtau/4).
In CAMB note 12p, regular initial condition series solution S.
In this solution, there is a sentense ‘Following [20]’, but [20] is not found.
What is ‘adotrad’ in module.f90 meaning?
I think ‘adotrad’ is H0*dsqrt(omega_R0), but it’s different value from adotrad.
And, does anyone know reference for scale factor S?
Any help would be appreciated.
I want to know reference about exact relation between scale factor and conformal time.
In subroutine initial, a=tau*adotrad*(1+omtau/4).
In CAMB note 12p, regular initial condition series solution S.
In this solution, there is a sentense ‘Following [20]’, but [20] is not found.
What is ‘adotrad’ in module.f90 meaning?
I think ‘adotrad’ is H0*dsqrt(omega_R0), but it’s different value from adotrad.
And, does anyone know reference for scale factor S?
Any help would be appreciated.