SNe Ia Redshift in a Non-Adiabatic Universe
Abstract
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 H0, than the standard model with two parameters, H0 and the cosmological constant related density . The new approach is compliant with the cosmological principle. It yields the H0=68.28 (+- 0.53) km s-1Mpc-1 with an analytical value of the deceleration parameter q0=-0.4. The analysis presented is for a matter only, flat universe. The cosmological constant may thus be considered as a manifestation of a non-adiabatic universe that is treated as an adiabatic universe.
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