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Bianchi Type-I Massive String Magnetized Barotropic Perfect Fluid Cosmological Model in the Bimetric Theory of Gravitation |
| N. P. Gaikwad1**, M. S. Borkar2, S. S. Charjan3
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1Department of Mathematics, Dharampeth M. P. Deo Memorial Science College, Nagpur 440 033, India
2Post Graduate Department of Mathematics, Mahatma Jyotiba Phule Educational Campus, Amravati Road, R. T. M. Nagpur University, Nagpur 440 033, India
3Department of Mathematics, Late K. Z. S. Science College, Bramhni, Kalmeshwar 441 501 Dist. Nagpur, India
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| Cite this article: |
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N. P. Gaikwad, M. S. Borkar, S. S. Charjan 2011 Chin. Phys. Lett. 28 089803 |
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Abstract We investigate the Bianchi type-I massive string magnetized barotropic perfect fluid cosmological model in Rosen's bimetric theory of gravitation with and without a magnetic field by applying the techniques used by Latelier (1979, 1980) and Stachel (1983). To obtain a deterministic model of the universe, it is assumed that the universe is filled with barotropic perfect fluid distribution. The physical and geometrical significance of the model are discussed. By comparing our model with the model of Bali et al. (2007), it is realized that there are no big-bang and big-crunch singularities in our model and T=0 is not the time of the big bang, whereas the model of Bali et al. starts with a big bang at T=0. Further, our model is in agreement with Bali et al.(2007) as time increases in the presence, as well as in the absence, of a magnetic field.
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98.80.Cq
04.20.-q
41.20.-w.
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Received: 04 February 2011
Published: 28 July 2011
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| PACS: |
98.80.Cq
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(Particle-theory and field-theory models of the early Universe (including cosmic pancakes, cosmic strings, chaotic phenomena, inflationary universe, etc.))
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04.20.-q
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(Classical general relativity)
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41.20.-w.
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