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Do Recent Supernovae ia Observations Tend to Rule Out all the Cosmologies?

Vishwakarma, Ram Gopal

Dark energy and the accelerated expansion of the universe have been the direct predictions of the distant supernovae Ia observations which are also supported, indirectly, by the observations of the CMB anisotropies, gravitational lensing and the studies of galaxy clusters. Today these results are accommodated in what has become the concordance cos…

Constraints on Simplified Quartessence Cosmology from the Latest Observational Data

Wu, Puxun; Dong, Sumei

The simplified generalized Chaplygin gas (GCG) model as a candidate of UDME is studied in this paper. By using the latest 162 ESSENCE type Ia supernovae (Sne Ia) data, 30 high red shift Sne Ia data and the distance ratio from z = 0.35 to z = 1089 (the red shift of decoupling), we obtain Ω _k = 0.076_-0.077^+0.093 and …