ИСТИНА

We present results of the long-slit and 3D spectroscopic study of a sample of galaxies, the morphology of which represents peculiar structures: polar rings, warp discs, and tidal tails. One of probable explanations of these features is an external gas accretion onto galaxies from nearby components or cosmological filaments. We have studied the chemical abundance and ionized gas kinematics in two subsamples: (i) the best candidates from SDSS-based polar ring catalog; (ii) star-forming dwarf galaxies in two voids that reveal unusual and perturbed optical morphology. Our goal was to find observational signs of chemical heterogeneity or kinematic perturbation in ionized gas caused by the external gas accretion. Here we presents the results of [O/H] measurements and gas excitation analysis in polar ring galaxies, and a study of the ionized gas kinematics of the galaxies residing in voids.