Script to plot particular diagram Omega_Lambda vs Omega_m or w vs Omega_m

Use of Cobaya. camb, CLASS, cosmomc, compilers, etc.
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Dournac Fabien
Posts: 48
Joined: May 18 2019
Affiliation: IRAP
Contact:

Script to plot particular diagram Omega_Lambda vs Omega_m or w vs Omega_m

Post by Dournac Fabien » June 14 2021

Hello,

I have covariance matrices and markov chains coming from the SCP (Supernova Cosmology Project) and I would like to plot all these data
in the particular diagram Omega_Lambda vs Omega_m or w vs Omega_m.

For example, I would like to get this kind of figures :

Image

and

Image

It doesn't matter if this kind of scripts used are coded in Python, IDL or Matlab.

Any suggestion/help is welcome.

Regards

Dournac Fabien
Posts: 48
Joined: May 18 2019
Affiliation: IRAP
Contact:

Re: Script to plot particular diagram Omega_Lambda vs Omega_m or w vs Omega_m

Post by Dournac Fabien » June 15 2021

Hi,

I managed to get the covariance matrice available on : http://supernova.lbl.gov/Union/figures/SCPUnion2.1_covmat_nosys.txt
from the SCP (SuperNova Cosmology Project) : http://supernova.lbl.gov/Union/

Once downloaded, I computed the associated Fisher matrix. But I realize that the size of the matrix is 307x307.

I don't know how to exploit this such big and only one covariance/Fisher matrix.

On the figures above, there are 3 probes (CMB, SNIa and BAO) and in grey I guess the cross of the 3 previous cited probes.

Anyone could have an idea about how to handling this large matrix : maybe the authors have made a synthesis of the 3 probes + cross-correlation in a unique matrix. If this is the case, how to breakdown this only one matrix to plot individually each probe ?

Regards

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