Defying the laws of Gravity I: Model-independent reconstruction of the Universe expansion from growth data Auteur(s): L'Huillier Benjamin, Shafieloo Arman, Polarski D., Starobinsky Alexei A. (Article) Publié: Monthly Notices Of The Royal Astronomical Society, vol. 494 p.819-826 (2020) Texte intégral en Openaccess : Ref HAL: hal-02178711_v1 Ref Arxiv: 1906.05991 Ref INSPIRE: 1739993 DOI: 10.1093/mnras/staa633 WoS: 000535885900062 Ref. & Cit.: NASA ADS Exporter : BibTex | endNote 10 Citations Résumé: Using redshift space distortion data, we perform model-independent reconstructions of the growth history of matter inhomogeneity in the expanding Universe using two methods: crossing statistics and Gaussian processes. We then reconstruct the corresponding history of the Universe background expansion and fit it to Type Ia supernovae data, putting constraints on (Ω_m, 0, σ_8, 0). The results obtained are consistent with the concordance flat-ΛCDM model and General Relativity as the gravity theory given the current quality of the inhomogeneity growth data. |