Matter power spectrum: from Ly$\alpha$ forest to CMB scales

Solène Chabanier (1) , Marius Millea (2, 3) , Nathalie Palanque-Delabrouille (1)

1 IRFU - Institut de Recherches sur les lois Fondamentales de l'Univers
2 IAP - Institut d'Astrophysique de Paris
3 Institut Lagrange de Paris

We present a new compilation of inferences of the linear 3D matter power spectrum at redshift |$z\, {=}\, 0$| from a variety of probes spanning several orders of magnitude in physical scale and in cosmic history. We develop a new lower noise method for performing this inference from the latest Ly α forest 1D power spectrum data. We also include cosmic microwave background (CMB) temperature and polarization power spectra and lensing reconstruction data, the cosmic shear two-point correlation function, and the clustering of luminous red galaxies. We provide a Dockerized Jupyter notebook housing the fairly complex dependences for producing the plot of these data, with the hope that groups in the future can help add to it. Overall, we find qualitative agreement between the independent measurements considered here and the standard ΛCDM cosmological model fit to the Planck data.

Mots clés: large-scale structure of Universe; cosmology: observations

Domaines: Astrophysique [astro-ph]

Solène Chabanier, Marius Millea, Nathalie Palanque-Delabrouille. Matter power spectrum: from Ly$\alpha$ forest to CMB scales. Monthly Notices of the Royal Astronomical Society, 2019, 489 (2), pp.2247-2253. ⟨10.1093/mnras/stz2310⟩. ⟨hal-02148261⟩