FIZIKA B 19 (2010) 4 , 193-200

size 99 kBsize 420 kB

A COSMOLOGICAL MODEL WITH VARYING G AND Λ TERM IN GENERAL RELATIVITY

R. K. TIWARIa, S. S. TIWARIa and P. PANDEYb
aDepartment of Mathematics, Government Model Science College, Rewa (M.P.), India
bDepartment of Physics, Government Model Science College, Rewa (M.P.), India

Received 21 February 2009;     Revised manuscript received 3 April 2010
Accepted 17 November 2010     Online 8 March 2011

Einstein's field equations with variable gravitational constant and cosmological constants are considered in the presence of perfect fluid for Bianchi type-I universe by assuming the cosmological term proportional to R−m (R is scale factor and m is a constant). The model approaches quasi-isotropic state. The cosmological term decreases with increasing time. We obtain that the present universe is accelerating with a large fraction of cosmological density in the from of cosmological term.

PACS number: 98.80.-k
UDC: 524.83

Keywords: cosmology, Bianchi type-I universe, variable cosmological term

Copyright by The Croatian Physical Society
For problems or questions please contact fizika@fizika.hfd.hr