2024/05/19 by Vikrant Yadav, Rajpal Rajpal, Yadav, Vikrant +6 · 1 citation
Economics, Econometrics and Finance · Environmental Science · Mathematics · #Cosmology and Nongalactic Astrophysics (astro-ph.CO) #FOS: Physical sciences #General Relativity and Quantum Cosmology (gr-qc) #Soil Geostatistics and Mapping #Spatial and Panel Data Analysis #Statistical Methods and Inference
paper · pdf · doi:10.48550/arxiv.2405.11534
openalex publication_date 2024/05/19 · openalex created_date 2024/05/22 · openalex updated_date 2026/07/28
In this letter, we report the observational constraints on a Bianchi type I anisotropic extension of wCDM model with spatial curvature from observational data including Baryon Acoustic Oscillations (BAO), Cosmic chronometers (CC), Big Bang nucleosynthesis (BBN), Pantheon+ (PP) compilation of SNe Ia and SH0ES Cepheid host distance anchors. The anisotropy is found to be of the order 10-13, which interplay with spatial curvature to reduce H0 tension by ∼ 1σ as found in the analyses with BAO+CC+BBN+PP combination of data, while no significant effect of anisotropy is observed with BAO+CC+BBN+PPSH0ES combination of data. A closed Universe is favored by wCDM as well as anisotropic wCDM models with spatial curvature in analyses with BAO+CC+BBN+PP combination of data. An observation of an open Universe from wCDM model with spatial curvature in analyses with BAO+CC+BBN+PPSH0ES combination of data and a closed Universe from anisotropic wCDM model with curvature in analyses with same combination of data is made. The quintessence form of dark energy is favored at 95% CL in both analyses.