The Time-Dependent Lambda Parameter in Haug-Tatum R H = c t Cosmology Appears Consistent with Recent DESI Findings

Abstract

Based on the Haug-Tatum R H t = c t cosmology model redshift formula, z = R H 0 R H t − 1 = H t H 0 − 1 , we demonstrate that the time-dependent Lambda parameter as a function of z must be Λ t = Λ 0 ( 1 + z ) 4 . This equation is also consistent with the Haug and Tatum formula, Λ t = 3 H t 2 c 2 = 3 ( ℧ T t 2 c ) 2 and the observation-based relation, T t = T 0 ( 1 + z ) . We also show how H 0 predicted by the Haug-Tatum model is most consistent with the DESI-based H 0 estimates from the ω 0 ω a CDM model that allows for dynamic dark energy.