FIZIKA B 18 (2009) 3, 181-188

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LETTER TO THE EDITOR

BIANCHI TYPE-III STRING COSMOLOGICAL MODELS WITH BULK VISCOSITY AND TIME-DEPENDENT L TERM

R. K. TIWARIa and U. K. DWIVEDIb
aDepartment of Mathematics, Govt. Model Science College, Rewa (MP) India
bDepartment of Mathematics, Govt. Engineering College, Rewa (MP) India

Received 2 April 2008;   Accepted 15 July 2009
Online 7 October 2009

We study Einstein's field equations in Bianchi type-III string cosmological models with bulk viscosity and variable cosmological term L. Exact solutions of the field equations are obtained by assuming the conditions: the bulk viscosity is proportional to the expansion scalar, x q, expansion scalar is proportional to shear scalar, q s, and L is proportional to the Hubble parameter. The corresponding physical interpretations of the cosmological solutions are also discussed.

PACS numbers: 04.20.Jb, 98.80.Cq
UDC 524.83,

Keywords: Bianchi type-III string cosmological model, variable L, bulk viscosity, expansion scalar, shear scalar, Hubble parameter

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