FIZIKA B 16 (2007)  2, 99 - 112

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BULK VISCOUS COSMOLOGICAL MODELS IN GENERAL RELATIVITY

A. PRADHANa, V. RAIb and R. S. SINGHb
a
Department of Mathematics, Hindu Post-graduate College, Zamania-232 331, Ghazipur, India
E-mail addresses:  pradhan@iucaa.ernet.inacpradhan@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

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