ИСТИНА

By trying to understand the origin of extended gaseous disks in S0 galaxies, we have obtained full-sized gas velocity fields for 17 galaxies by observing strong emission lines [NII]6583, H-alpha, [OIII]5007 with the scanning Fabry-Perot interferometer of the Russian 6-meter telescope. Indeed, misalignments between the rotation axes of the gaseous and stellar disks are frequent in the sample galaxies; sometimes we see strong warps of the gaseous disk planes. By comparing the space orientations of the ionized-gas disks with those of the stellar disks and of the outer HI disks, we discuss the possible outer gas accretion and the subsequent dynamical evolution of the gas distributions.