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We select 753 S0 galaxies from the internal Product Lauch-10 of MaNGA survey(MPL-10) and find that $\sim$11% of S0 galaxies show gas-star kinematicmisalignments, which is higher than the misaligned fraction in spiral($\sim$1%) and elliptical galaxies ($\sim$6%) in MPL-10. If we only considerthe emission-line galaxies (401 emission-line S0s), the misaligned fraction inS0s increases to $\sim$20%. In S0s, the kinematic misalignments are more commonthan the merger remnant features ($\sim$8%). Misaligned S0s have lower massesof stellar components and dark matter halos than S0s with merger remnantfeatures. Based on the $NUV-r$ versus $M_*$ diagram, we split galaxies intothree populations: blue cloud (BC), green valley (GV) and red sequence, findingthat BC and GV misaligned S0s have positive $\mathrm{D}_n4000$ radial gradientswhich indicates younger stellar population in the central region than theoutskirts. Through comparing the misaligned S0s with a control sample for thewhole S0 galaxy sample, we find that the BC and GV misaligned S0s show youngerstellar population at $R\lesssim R_e$ and older population at $R\gtrsim R_e$than the control samples. Considering the high incidence of kinematicmisalignments in S0 galaxies and the properties of environments and stellarpopulations, we propose misaligned gas accretion as an important formationpathway for S0s.

Misaligned gas accretion as a formation pathway of S0 galaxies