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FIZIKA B 16 (2007) 4, 205-222
 
MAGNETIZED STRING COSMOLOGICAL MODEL IN CYLINDRICALLY-SYMMETRIC
INHOMOGENEOUS UNIVERSE WITH VARIABLE COSMOLOGICAL TERM L
ANIRUDH PRADHAN
Department of Mathematics, Hindu Post-Graduate College, Zamania-232 331, Ghazipur, India
E-mail addresses: [email protected], [email protected]
Received 25 October 2007; Accepted 5 December 2007
Online 15 February 2008
Cylindrically-symmetric inhomogeneous magnetized string cosmological model is
investigated with cosmological term L varying with
time. To get the deterministic solution, it has been assumed that the expansion
(q) in the model is proportional to the eigenvalue
s1 1 of the shear tensor si j.
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 physical and geometric properties of the model are also
discussed in the presence and absence of magnetic field.
PACS numbers: 98.80.Cq, 04.20.-q, 98.80.Es
UDC 524.83
Keywords: strings, inhomogeneous universe, cylindrical symmetry, variable cosmological term
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