BD-FRW models in the framework of Israel-Stewart-Hiscock theory.

Details BD-FRW models in the framework of Israel-Stewart-Hiscock theory. BD-FRW models in the framework of Israel-Stewart-Hiscock theory.

Dec 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995prama..45..511d&link_type=abstract

Pramāna, Vol. 45, No. 6, p. 511 - 517

Physics

4

Universe: Deceleration Parameter

Scientific paper

A BD-FRW universe filled with imperfect fluid having bulk viscosity is investigated under the framework of Israel-Stewart-Hiscock causal theory. The field equations have been solved by using the relation φ = K R2 where K and α are constants, between the Brans-Dicke scalar field φ and the scale factor R. This relation, in fact, leads to a constant deceleration parameter q. It is shown that the constancy of the deceleration parameter permits only two possibilities i.e. either H = constant with m = 1 or m = (1+b-a)/(2(1+b)-a), irrespective of the value of ɛ.

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