SNe Ia Redshift in a Nonadiabatic Universe

摘要

By relaxing the constraint of adiabatic universe used in most cosmological models, we have shown that the new approach provides a better fit to the supernovae Ia redshift data with a single parameter, the Hubble constant H 0 , than the standard ΛCDM model with two parameters, H 0 and the cosmological constant Λ related density, Ω Λ . The new approach is compliant with the cosmological principle. It yields the H 0 = 68.28 (±0.53) km s ?1 Mpc ?1 with an analytical value of the deceleration parameter q 0 = ?0.4. The analysis presented is for a matter-only, flat universe. The cosmological constant Λ may thus be considered as a manifestation of a nonadiabatic universe that is treated as an adiabatic universe.