Age and metallicity of the bulges in lenticular galaxies
Olga K. Sil'chenko (Sternberg Astronomical Institute, Moscow)
TL;DR
This study analyzes the ages and metallicities of bulges in 80 nearby lenticular galaxies using spectroscopic data, revealing chemical distinctions and correlations in their stellar populations.
Contribution
It provides detailed measurements of stellar population parameters in S0 galaxy bulges and nuclei, highlighting chemical differences and population correlations.
Findings
Half of the galaxies have chemically distinct, younger, and more metal-rich nuclei.
Stellar population properties show specific correlations in nearby S0 galaxies.
Data enhances understanding of bulge and nucleus formation in lenticular galaxies.
Abstract
Panoramic spectroscopic data of the sample of 80 nearby lenticular galaxies obtained with the Multi-Pupil Fiber Spectrograph of the 6-m telescope are presented. The SSP-equivalent ages, [Z/H], and [Mg/Fe] are determined through the Lick indices H-beta, Mgb, and <Fe> separately for the nuclei and for the bulges. About a half of the sample contain chemically distinct nuclei, more metal-rich and younger than the bulges. The correlations of the stellar population properties for the nearby S0s are discussed.
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