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Current issue   Ukr. J. Phys. 2014, Vol. 58, N 4, p.398-402

    Paper

Zadorozhna L.V.1, Hnatyk B.I.2, Sitenko Yu.A.3

1 Taras Shevchenko National University of Kyiv, Faculty of Physics
(2, Academician Glushkov Ave., Bld. 1, Kyiv 03127, Ukraine; e-mail: Zadorozhna_Lida@ukr.net)
2 Taras Shevchenko National University of Kyiv, Astronomical Observatory
(3, Observatorna Str., Kyiv 04053, Ukraine; e-mail: hnatyk@observ.univ.kiev.ua)
3 Bogolyubov Institute for Theoretical Physics, Nat. Acad. of Sci. of Ukraine
(14b, Metrolohichna Str., Kyiv 03680, Ukraine; e-mail: yusitenko@bitp.kiev.ua)

Magnetic Field of Cosmic Strings in the Early Universe

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

Abstract: Cosmic strings are topological defects which can be formed as a result of phase transitions with a spontaneous symmetry breaking in the early Universe. The possibility of the generation of a magnetic field around a cosmic string on the Grand Unification energy scale (GUT scale) in the early Universe immediately after the termination of the deconfinement-confinement phase transition has been analyzed. It is found that a circular current and a magnetic field directed along the string are induced around the string in the vacuum of a pseudoscalar matter consisting of charged pions. We also have studied the interaction between the magnetic flux tube surrounding the string (the string magnetosphere) and the cosmic plasma in the early Universe. A possibility of magnetization of the cosmic plasma surrounding the string owing to its interaction with the string magnetic field has been analyzed.

Key words: cosmic string, phase transitions, vacuum polarization effect, ultrarelativistic plasma, vacuum of pseudoscalar matter consisting of charged pions, bow shock, magnetic tube.