Graduate Could a CPL parametrization be included into Brans-Dicke model?

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The discussion focuses on integrating the CPL parametrization into the Brans-Dicke model for cosmological studies. The user has been analyzing forecasts to constrain cosmological parameters using Matter power spectra generated by CAMB and CLASS codes. They are exploring the possibility of generating specific Matter power spectra for the Brans-Dicke framework using Hi-CLASS. The goal is to assess constraints on both classical cosmological parameters and the CPL parameters w_0 and w_a. The user seeks guidance on whether these two modified models can coexist within their research.
fab13
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After doing some forecasts with w_0,wa CDM, I would like to know if i can keep the same structure of the code but with generating Matter power spectra of Brans-Dicke
I have studied up to now about forecasts to constrain cosmological parameters in the context of CPL( Chevallier-Polarski-Linder ) parametrization with w_0, ,w_a parameters in equation of state for cosmic fluid.

For this, I have used Matter power spectra ("fake data") generated by CAMB and CLASS codes.

Now, I have to study the Brans-Dicke model : I think about generating Matter power spectra with CLASS (or rather Hi-CLASS) which has an option to generate specific Matter power spectra dedicated to Brans-Dicke framework.

I would like to know if I could keep the CPL parametrization in Brans-Dicke model, i.e generating Brans-Dicke Matter power spectra and include them into the forecast code in order to assess constraints on classical cosmological parameters and also on w_0,w_a parameters.
 
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Hello, could this post be transfered to "

Beyond the Standard Model Forum " forum ? , I think this would be more suitable

 
Could anyone give me some clues or some elements of answer ? The 2 modified models could co-exist ?

Thanks
 
"Supernovae evidence for foundational change to cosmological models" https://arxiv.org/pdf/2412.15143 The paper claims: We compare the standard homogeneous cosmological model, i.e., spatially flat ΛCDM, and the timescape cosmology which invokes backreaction of inhomogeneities. Timescape, while statistically homogeneous and isotropic, departs from average Friedmann-Lemaître-Robertson-Walker evolution, and replaces dark energy by kinetic gravitational energy and its gradients, in explaining...

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