ИСТИНА

We have studied the origin of gas in a sample of early-type (S0-S0/a) galaxies possessing extended (more than a few kpc in size) ionized-gas discs and/or external UV-rings. The large-scale ionized gas velocity fields were constructed from 3D spectroscopic observations undertaken with a scanning Fabry-Perot interferometer of the SAO RAS 6-m telescope. Analysis of these data together with available archival information on the central regions (e.g. the SAURON kinematical maps) and on the external HI gas behaviours provides evidences for gas accretion from outside in the most of the observed objects.