Abstract
Cosmic Microwave Background (CMB) independent approaches are frequently used in the literature to provide estimates of Hubble constant (H0). In this work, we report CMB independent constraints on H0 in an anisotropic extension of ΛCDM model using the Big Bang Nucleosynthesis (BBN), Baryonic Acoustic Oscillations (BAOs), Cosmic Chronometer (CC), and Pantheon+ (PP) compilation of Type Ia supernovae and SH0ES Cepheid host distance anchors data. In the anisotropic model, we find H0=70.1−1.5+1.2(72.67±0.85)kms−1Mpc−1 both with 68% CL from BAO+BBN+CC+PP (BAO+BBN+CC+PPSH0ES) data. The analyses of the anisotropic model with the two combinations of datasets reveal that anisotropy is positively correlated with H0, and an anisotropy of the order 10−14 in the anisotropic model reduces the H0 tension by ∼2σ.
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