Massive String Cosmological Model for Ferfect Fluid Distribution with Cosmological Term ? In Bimetric Theory of Gravitation
Keywords:
Bimetric Gravitational Theory, Electromagnetic Field, CosmologyAbstract
Massive string magnetized cosmological model for perfect fluid distribution with cosmological term is deduced by solving Rosen’s field equations. To deduce a determinate solution, the condition A =Bn(where,n> 0 real constants), between the metric potentials is used. It is seen that Massive string Bianchi Type I magnetized cosmological model (36) in bimetric theory of gravitation exists. It never goes to vacuum model . When , then , and when , then , . This confirms that the model is expanding as well as shearing. The expansion and the shear in the model increases as cosmic time increases. Further when , then , . When then and , which shows that our model goes over to vacuum model, when the cosmic time is minus infinity. In the special case, in the absence of magnetic field i.e., , it is seen that, our model (36) exists. Also the expansion and shear in the model increases, as the cosmic time increases.
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