FIZIKA B 19 (2010) 1, 29-42

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BIANCHI TYPE-III ANISOTROPIC UNIVERSES WITH A CLOUD OF STRINGS IN LYRA'S GEOMETRY

VINEET KUMAR YADAVa*, LALLAN YADAVa,** and ANIL KUMAR YADAVb
aDepartment of Physics, D. D. U. Gorakhpur University, Gorakhpur-273 009, India
E-mail addresses: *vineetky@yahoo.co.in   **nisaly06@rediffmail.com
bDepartment of Physics, Anand Engineering college, Keetham, Agra-282 007, India
E-mail address: abanilyadav@yahoo.co.in

Received 28 June 2009;     Revised manuscript received 19 April 2010
Accepted 12 May 2010     Online 21 May 2010

Bianchi type-III string cosmological models are investigated in the presence of string fluid as a source of matter in the framework of Lyra's geometry. It is observed that the models start with singular state and evolve continuously as t ¥. It is found that, in all cases, the displacement vector b(t) is a decreasing function of time analogous to the behaviour of the cosmological constant L. The physical and geometrical aspects of the models are also discussed.

PACS numbers: 98.80.Cq, 04.20.-q
UDC 524.83

Keywords: cosmology, string theory, Bianchi type-III, Lyra's geometry

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