LQ12081

Signature of Superconducting String in Early Universe

Gamma-ray bursts (GRBs) are the most powerful explosions in the Universe. The recent discovery of several very distant GRBs has opened a unique possibility for the study of the physical processes in the early Universe. These GRBs originated when the Universe was around 630 million years old. However, they cannot be classified in the traditional classes considered for nearby GRBs. Moreover, they pose a serious challenge for the conventional star formation theory, since the early Star Formation Rate is too high. In our paper we show that a possibility to solve these observational contradictions is to assume that the distant GRBs have another physical source than the conventional GRBs. We propose that they are observational evidence for the existence of the superconducting cosmic strings, linear topological defects that could be formed in the early Universe, as predicted in unified particle physics theories. However, up to now there is no direct observational evidence for cosmic strings. If the distant GRBs originate from cosmic strings, their strange properties can be immediately explained. We can also constrain the primordial cosmic magnetic field, and its evolution. Therefore the study of distant GRBs can provide some essential information about the fundamental properties of cosmic strings.