Rotational perturbations of charged cosmological viscous-fluid universes coupled with a scalar field |
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| Authors: | Manihar Singh Koijam |
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| Institution: | (1) Department of Mathematics, Manipur University, Imphal, Manipur, India |
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| Abstract: | The dynamics of a slowly rotating charged viscous-fluid Universe coupled with a zero-mass scalar field is investigated; and the rotational perturbations of such models are studied in order to substantiate the possibility that the Universe is endowed with slow rotation, in the course of presentation of several new analytic solutions. The effects of charged field and scalar field on the rotational motion are discussed. Except for perfect dragging, the scalar field as well as the charged field is found to have a damping effect on the rotation of matter. Rotating models which are expanding as well are obtained, in which cases the rotational velocities are found to decay with the time, and these models may be taken as good examples of real astrophysical situations. The periods of physical validity of different models are also obtained. |
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