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Current issue   Ukr. J. Phys. 2014, Vol. 59, N 5, p.547-554

    Paper

Lelyakov O.P., Karpenko A.S., Babadzhan R.-D.O.

V.I. Vernadskyi Tavrida National University
(4, Vernadskyi Ave., Simferopil 95700, Ukraine; e-mail: lelyakov@crimea.edu)

Scalar-Field Potential Distribution for a Closed “Thick” Null String Moving in the Plane z = 0

Section: Astrophysics and cosmology
Original Author's Text: Ukrainian

Abstract: A general form for the scalar-field potential distribution has been proposed for a closed “thick” null string either collapsing or expanding in the plane z = 0. Conditions, under which the energy-momentum tensor components for a scalar field that contracts into a one-dimensional object (a circle with a varying radius) asymptotically coincide with those for a closed null string moving along the same trajectory, have been found.

Key words: scalar-field potential, “thick” null string, energy-momentum tensor.