Observational evidence to logistic dark energy driving the accelerating universe

Abstract We present logistic dark energy model (LDEM), where the dark energy density follows a logistic function of the scale factor. The equation of state parameter of dark energy ( w D ) transitioned from −1 in the distant past to its current value of −0.76, closely resembling the ΛCDM model in the early epoch and showing significant deviation in the late phase. The evolution of the deceleration parameter in the LDEM signifies its success in explaining the late-time cosmic acceleration. Model selection based on the Bayesian Information Criterion (BIC), incorporating observations from Type Ia Supernovae (SNe Ia), Observational Hubble data (OHD), and Baryon Acoustic Oscillation (BAO) strongly favors the LDEM over the conventional ΛCDM model, where BIC is estimated to be ∼−20. Incorporating the shift parameter derived from the Cosmic Microwave Background (CMB) data shows competing evidence of the LDEM over the standard ΛCDM. Remarkably, the Hubble constant ( H 0 ) value obtained using LDEM model (Better-fit model as compared to the ΛCDM model) using any of the datasets falls within the range of 63 to 66, which is significantly lower than the H 0 value obtained from model-independent local measurements. This discrepancy suggests a need to reconsider the systematic uncertainties associated with local measurements.