Hi,
I'm trying to calculate the GR correction for an Nbody simulation as defined below.
[math]
(https://arxiv.org/pdf/1811.00904.pdf)
Is there a general routine to calculate such a quantity in the CAMB code?
Thanks for any help!
Minseong
CAMB: GR correction?

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 Joined: April 24 2024
 Affiliation: Seoul National University

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Re: CAMB: GR correction?
It's not precoded. You can use the tools of
https://camb.readthedocs.io/en/latest/ScalEqs.html
to relate to CAMB synchornousgauge variables, e.g. I think you basically want A(t) (acceleration) in the gauge in which h(t)=0 (perturbation to scale factor), and subtract the acceleration you get from the Poisson equation.
https://camb.readthedocs.io/en/latest/ScalEqs.html
to relate to CAMB synchornousgauge variables, e.g. I think you basically want A(t) (acceleration) in the gauge in which h(t)=0 (perturbation to scale factor), and subtract the acceleration you get from the Poisson equation.

 Posts: 2
 Joined: April 24 2024
 Affiliation: Seoul National University
Re: CAMB: GR correction?
I appreciate your help!