Physics
Scientific paper
Feb 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009cotph..51..367p&link_type=abstract
Communications in Theoretical Physics, Volume 51, Issue 2, pp. 367-374 (2009).
Physics
18
Scientific paper
Some cylindrically symmetric inhomogeneous viscous fluid string cosmological models with magnetic field and cosmological term Λ varying with time are investigated. To get the deterministic solution, it has been assumed that the expansion (θ) in the model is proportional to the eigen value σ11 of the shear tensor σji. The value of cosmological constant for the model is found to be small and positive, which is supported by the results from recent supernovae Ia observations. The effect of bulk viscosity is to produce a change in perfect fluid and hence exhibits essential influence on the character of the solution. The physical and geometric properties of the models are also discussed in presence and absence of magnetic field.
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