ИСТИНА

By exploring the long-slit spectrograph RSS of the Southern African Large Telescope,we have obtained and reduced long-slit spectrum of the S0 galaxy IC 560. The line-of-sight velocity profiles of the ionized gas and of the stars in the galaxy were calculated. We have found that the gaseous disk of IC 560 is counterrotating with respect to the stellar disk. In the center of IC 560 we have detected strong emission lines H-alpha, [NII]6583, [SII]6716.4,6730.6 and [OIII]5007. We have analyzed the ratios of the different emission line intensities to reveal gas excitation mechanism by using BPT diagnostic diagrams. We have detected the ring-like region within 4" < |r|< 12" where gas excitation is dominated by star-forming process. Also we have compared stellar and gaseous metallicities at the same distance from the center of the galaxy;the gas reveals solar oxygen abundance while the stellar population at the same radius is metal-poor.