SDSS-IV MaNGA: integral-field kinematics and stellar population of a sample of galaxies with counter-rotating stellar discs selected from about 4000 galaxies

ABSTRACT We present the integral-field kinematics and stellar population properties of 64 galaxies (61 are Early-Type galaxies; ETGs) with Counter-Rotating Disks (CRD) selected from about 4000 in MaNGA survey, based on evidence counter-rotation or two velocity dispersion peaks kinematic maps. For 17 CRDs, counter-rotating components can also be separated spectroscopically. The frequency CRDs is <5 per cent for ellipticals, <3 lenticulars, <1 spirals (at 95 confidence level), consistent previous estimates. produced age metallicity maps, compared to those general ETGs population. found that have similar trends ETGs, but less metallic at low masses, show flatter steeper gradients, average. A comparison fields ionized gas stars reveals 33 cases corotates either inner (15 cases) outer (18 disc, nine it misaligned. In most younger disc. Evidence multimodality 31 galaxies, while 14 youngest least massive ongoing star formation; instead, exhibit unimodality, oldest massive. As a result, our work indicates form primarily via accretion retrograde rotation respect pre-existing