ИСТИНА

The neutral gas distribution in the large number of nearby galaxies appears as complexes of shells and supershells with a size up to 1-2 kpc (so-called supergiant shells, SGS). Most probably these structures were created by multiple stellar winds and supernova explosions occurred during the lifetime of the SGS. According to the modern understanding the SGSs expansion triggers new bursts of star formation in their rims. The ionized gas structure in such galaxies appears as HII complexes located mostly in the walls of the giant HI shells. We performed the observations of the star formation complexes in the SGSs rims of several nearby irregular galaxies using Fabry-Perot interferometer at the 6-m telescope of Special Astrophysical Observatory of Russian Academy of Sciences. These data were used to study the ionized gas structure and kinematics in the star formation regions. Several shells and superbubbles of ionized gas were found. We tried to reveal the signatures of the occurred star formation influence on the parent HI supershells. Here we report the results of the study. This study was supported by the Russian Science Foundation (grant 14-22-00041).