FIZIKA B 18 (2009) 3, 181188
LETTER TO THE EDITOR
BIANCHI TYPEIII STRING COSMOLOGICAL MODELS WITH BULK VISCOSITY AND
TIMEDEPENDENT L TERM
R. K. TIWARI^{a} and U. K. DWIVEDI^{b}
^{a}Department of Mathematics, Govt. Model Science College, Rewa (MP)
India
^{b}Department 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 typeIII 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 typeIII string cosmological model, variable
L, bulk viscosity, expansion scalar, shear scalar, Hubble parameter
