We have obtained 2D spectral data for a sample of 58 nearby S0 galaxies with the Multi-Pupil Spectrograph of the 6m telescope of the Special Astrophysical Observatory of the Russian Academy of Sciences .
The Lick indices H \beta , Mgb , and \langle \mbox { Fe } \rangle are calculated separately for the nuclei and for the bulges taken as the rings between R = 4 \arcsec and 7 \arcsec ; and the luminosity-weighted ages , metallicities , and Mg/Fe ratios of the stellar populations are estimated by confronting the data to SSP models .
Four types of galaxy environments are considered : clusters , centers of groups , other places in groups , and field .
The nuclei are found to be on average slightly younger than the bulges in any types of environments , and the bulges of S0s in sparse environments are younger than those in dense environments .
The effect can be partly attributed to the well-known age correlation with the stellar velocity dispersion in early-type galaxies ( in our sample the galaxies in sparse environements are in average less massive than those in dense environments ) , but for the most massive S0s , with \sigma _ { * } = 170 - 220 km/s , the age dependence on the environment is still significant at the confidence level of 1.5 \sigma .