Bianchi Type III Bulk Viscous Barotropic Fluid Cosmological Models with Variable G and Λ

2009 ◽  
Vol 26 (2) ◽  
pp. 029802 ◽  
Author(s):  
Raj Bali ◽  
Seema Tinker
Keyword(s):  
Bianchi Type ◽  
Cosmological Models ◽  
Variable G And Λ ◽  
Barotropic Fluid ◽  
Type Iii ◽  
Bulk Viscous ◽  
Variable G

Bulk Viscous Cosmological Models with Variable G and Λ

1998 ◽  
Vol 30 (4) ◽  
pp. 573-581 ◽  
Author(s):  
Tarkeshwar Singh ◽  
A. Beesham ◽  
W. S. Mbokazi
Keyword(s):  
Cosmological Models ◽  
Variable G And Λ ◽  
Bulk Viscous ◽  
Variable G

BULK VISCOUS ANISOTROPIC COSMOLOGICAL MODELS WITH VARIABLE G AND Λ

2002 ◽  
Vol 11 (06) ◽  
pp. 893-912 ◽  
Author(s):  
ANIRUDH PRADHAN ◽  
VINOD KUMAR YADAV
Keyword(s):  
Power Law ◽  
Bulk Viscosity ◽  
Bianchi Type ◽  
Einstein Field Equations ◽  
Variable G And Λ ◽  
Field Equations ◽  
Expansion Factor ◽  
Bulk Viscous ◽  
Suitable Power ◽  
Variable G

The Einstein field equations with bulk viscosity and variable G and Λ for Bianchi-type universes are studied under the assumption of a power-law time variation of the expansion factor, achieved via a suitable power-law assumption for the Hubble parameter suggested by M. S. Berman. All the models have a power-law variation of pressure and density and are singular at the epoch t = 0. The variation of G(t) as [Formula: see text] and Λ(t) as [Formula: see text] is consistent with these models.

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