ИСТИНА

We present the results of ionized gas motions study more than fifteen nearby dwarf galaxies using a scanning Fabry–Perot interferometers at the SAO RAS 6-m telescope. The different methods of detection expanding shells and other structures related with stellar feedback processes are discussed: velocity dispersion maps, `intensity-velocity dispersion', PV-diagrams. The analysis of 3D spectroscopic data suggests that velocity dispersion of the ionized gas does not reflect the virial motions in the gravitational potential of dwarf galaxies, the view which was often suggested. We find that gas motions are determined by the energy injected into the interstellar medium as a result of the ongoing star formation. The relationship between the SFR and the gas velocity dispersion is universal for a very broad range of galaxies luminosity.