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FIZIKA B 18 (2009) 3, 181-188
 
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 µ q,
expansion scalar is proportional to shear scalar, q
µ 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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