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Slowly rotating perfect-fluid universes coupled with zero-mass scalar field

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Abstract

Certain new analytic solutions for rotating perfect-fluid spheres in the Robertson-Walker universe are found out to substantiate the possibility of the existence of rotating cosmological objects coupled with zero-mass scalar field. Exact solutions for the metric rotation Ω(r, t) and the matter rotation ω(r, t) under different conditions are obtained and their nature and role are investigated. Except for perfect dragging the scalar field is found to have a damping effect on the rotation of matter. In some solutions we find out the restrictions on the radii of the models for realistic astrophysical situations. Rotating models which can also be expanding are also obtained, in which case the rotational velocities are found to decay with the time; and these models may be taken as examples of real astrophysical objects in the Universe.

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Authors and Affiliations

  1. Department of Mathematics, Manipur University, Canchipur, Imphal, Manipur, India

    Manihar Singh Koijam

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  1. Manihar Singh Koijam
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Koijam, M.S. Slowly rotating perfect-fluid universes coupled with zero-mass scalar field. Astrophys Space Sci 161, 111–123 (1989). https://doi.org/10.1007/BF00653242

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