Hubble Tension versus the Cosmic Evolution of Hubble Parameter in the Unicentric Model of the Observable Universe

Recently, a unicentric model of the observable universe (UNIMOUN) was proposed. Accordingly, big bangs are common events in our infinitely large, flat, homogeneous and isotropic parent universe. Their progenitors clusters cosmically dead massive neutron stars that merged after reaching ultimate lowest quantum energy state, where matter is an incompressible superconducting gluon-quark superfluid state zero-entropy, hence granting resulting measurable sizes immunity to collapsing into black holes. Our bang happened occur neighbourhood, thereby enduing universe, observed homogeneity isotropy. As enclosed mass progenitor finite, dynamically expanding curved spacetimes embedded fireball started flattening finally diffuse flat spacetime By means general relativistic numerical hydrodynamical calculations, we use H-metric follow time-evolution embedding during hadronization immediately following epochs. Based thereon, find kinetic newly created normal increases with distance self-similar manner, imitating outflows nearly non-interacting particles. On cosmic time scales, this behaviour yields Hubble parameter, H(t), which decreases slowly from event. Given sensitivity data Cosmic Microwave Background (CMB) Planck underlying cosmological model, conclude UNIMOUN viable alternative ΛCMD-cosmologies.