Original scientific paper
Generation of Bianchi-type V bulk viscous cosmological models with time-dependent λ-term
Anirudh Pradhan
; Department of Mathematics, Hindu Post-Graduate College, Zamania-232 331, Ghazipur, India
Kanti Jotania
; Dept. of Physics, Faculty of Science, The M.S. University of Baroda, Vadodara-390 002, Gujarat, India
Anju Rai
; Dept. of Mathematics, Hindu Post-Graduate College, Zamania 232 331, Ghazipur, India
Abstract
Bianchi type V bulk viscous fluid cosmological models are investigated with dynamic cosmological term λ(t). Using a generation technique (Camci et al., 2001), it is shown that the Einstein's field equations are solvable for any arbitrary cosmic scale function. Solutions for particular forms of cosmic scale functions are also obtained. The cosmological constant is found to be a decreasing function of time, which is supported by results from recent type Ia supernovae observations. Some physical and geometrical aspects of the models are also discussed.
Keywords
cosmology; Bianch type V universe; cosmological constant
Hrčak ID:
304372
URI
Publication date:
1.10.2006.
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