Some LRS Bianchi-I String Cosmological Models with Variable Deceleration Parameter

Details Some LRS Bianchi-I String Cosmological Models with Variable Deceleration Parameter Some LRS Bianchi-I String Cosmological Models with Variable Deceleration Parameter

2010-09-20

arxiv.org/abs/1009.3867v3

Anisotropic Models of Accelerating Universe: 80 - 98, 2011 (LAP, Germany)

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

11 pages, 6 figures, Unlike the previous version the new one contains the variable DP

Scientific paper

The present study deals with LRS Bianchi type I cosmological model representing massive string. The energy-momentum tensor for such string as formulated by Letelier (1983) is used to construct massive string cosmological models for which we assume that the shear scalar ($\sigma$) is proportional to the expansion scalar ($\theta$). The study reveals that massive strings dominate the early Universe. The strings eventually disappear from the Universe for sufficiently large time, which is in agreement with the current astronomical observations. Some physical and geometrical behaviour of models are also discussed.

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