ZIBETTI, StefanoStefanoZIBETTIGALLAZZI, Anna RitaAnna RitaGALLAZZIHirschmann, MichaelaMichaelaHirschmannConsolandi, GuidoGuidoConsolandiFalcón-Barroso, JesúsJesúsFalcón-Barrosovan de Ven, GlennGlennvan de VenLyubenova, MariyaMariyaLyubenova2022-03-282022-03-2820200035-8711http://hdl.handle.net/20.500.12386/31972We perform spatially resolved stellar population analysis for a sample of 69 early-type galaxies (ETGs) from the CALIFA integral field spectroscopic survey, including 48 ellipticals and 21 S0's. We generate and quantitatively characterize profiles of light-weighted mean stellar age and metallicity within ≲2R<SUB>e</SUB>, as a function of radius and stellar-mass surface density μ<SUB>*</SUB>. We study in detail the dependence of profiles on galaxies' global properties, including velocity dispersion σ<SUB>e</SUB>, stellar mass, morphology. ETGs are universally characterized by strong, negative metallicity gradients (∼ -0.3 dex per R<SUB>e</SUB>) within 1R<SUB>e</SUB>, which flatten out moving towards larger radii. A quasi-universal local μ<SUB>*</SUB>-metallicity relation emerges, which displays a residual systematic dependence on σ<SUB>e</SUB>, whereby higher σ<SUB>e</SUB> implies higher metallicity at fixed μ<SUB>*</SUB>. Age profiles are typically U-shaped, with minimum around 0.4 R<SUB>e</SUB>, asymptotic increase to maximum ages beyond ∼ 1.5 R<SUB>e</SUB>, and an increase towards the centre. The depth of the minimum and the central increase anticorrelate with σ<SUB>e</SUB>. A possible qualitative interpretation of these observations is a two-phase scenario. In the first phase, dissipative collapse occurs in the inner 1R<SUB>e</SUB>, establishing a negative metallicity gradient. The competition between the outside-in quenching due to feedback-driven winds and some form of inside-out quenching, possibly caused by central AGN feedback or dynamical heating, determines the U-shaped age profiles. In the second phase, the accretion of ex-situ stars from quenched and low-metallicity satellites shapes the flatter stellar population profiles in the outer regions.STAMPAenArticle10.1093/mnras/stz3205https://academic.oup.com/mnras/article/491/3/3562/56404722020MNRAS.491.3562ZFIS/05 - ASTRONOMIA E ASTROFISICAERC sectors::Physical Sciences and Engineering::PE9 Universe sciences: astro-physics/chemistry/biology; solar systems; stellar, galactic and extragalactic astronomy, planetary systems, cosmology, space science, instrumentation