The Fornax 3D project: Thick disks in a cluster environment.

摘要: We used deep MUSE observations to perform a stellar-kinematic and population analysis of FCC 153 177, two edge-on S0 galaxies in the Fornax cluster. The geometrical definition different structural components these allows us describe nature their thick disks. These are both old, relatively metal poor [Mg/Fe]-enhanced, star formation history (SFH) reveals minor younger component whose chemical properties suggest its later accretion. Moreover, outer regions geometrically defined disks show higher values metallicity lower [Mg/Fe]. stars probably formed thin-disk region they were dynamically heated form flares present galaxies. propose scenarios for three populations disks: in-situ formation, accretion disk heating. A clear distinction age is found between [Mg/Fe]-enhanced (old, $\sim 12-13$ Gyr), rich less thin (young, 4-5$ Gyr). signs recent nuclear regions. While more continuous SFHs, nuclei display rather bursty SFH. located outside densest cluster where 170 resides. This other galaxy was studied by \citet{Pinna2019}. compare discuss our results with this previous study. differences galaxies, at distances from center, that environment can have strong effect on evolutionary path.