|
FIZIKA B 16 (2007) 2, 99 - 112
 
BULK VISCOUS COSMOLOGICAL MODELS IN GENERAL RELATIVITY
A. PRADHANa, V. RAIb and R. S. SINGHb
aDepartment of Mathematics, Hindu Post-graduate College, Zamania-232 331, Ghazipur, India
E-mail addresses:
pradhan@iucaa.ernet.in, acpradhan@yahoo.com
bDepartment of Mathematics, Post-graduate College, Ghazipur-233 001, India
E-mail address: vandana_rai005@yahoo.co.in
Received 28 December 2005; Revised manuscript received 14 May 2007
Accepted 4 September 2007 Online 24 September 2007
A new class of exact solutions of Einstein's field equations with bulk
viscous fluid for an locally rotationally symmetric Bianchi type-I spacetime is
obtained by using a variable deceleration parameter. We have described three
cases, depending on the different forms of deceleration parameter, in which six
models of the universe are obtained. The value of Hubble's constant H0
is found to be less than unity for these models which are of the physical
interest. Some physical and geometric properties of the models are also
discussed.
PACS numbers: 04.20.-q, 98.80.-k
UDC 524.83
Keywords: cosmology, LRS Bianchi type-I universe, bulk viscous models,
deceleration parameter
|
