A statistical study of the area, which according to the radio data of CMB anisotropy contains a candidate for the cosmic string (field CSc-1), was carried out in order to additional justification of this candidate. Cosmic strings are one-dimensional cosmological-scale objects, which may manifest itself in particular as a gravitational lenses with special features. It was solved the problem of statistical comparison of the distribution density of gravitational-lens pairs of sources (galaxies) in fields that do not contain cosmic strings with the distribution of similar pairs in the CSc-1 field. Nonparametric rank shift criteria were used to work with small samples under an unknown distribution law; the limits of applicability of the criteria were discussed. The revealed difference between the two distributions serves as an additional argument in favor of the presence of a string in the CSc-1 field. The discovery of cosmic strings would serve as a unique observational test of modern cosmological theories, including multidimensional models.
95.75.Mn Image processing
$^1$Moscow State University, Physics Faculty
$^2$MSU, Sternberg astronomical institute