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The CALIFA team has recently found that the stellar angular momentum andconcentration of late-type spiral galaxies are incompatible with those oflenticular galaxies (S0s), concluding that fading alone cannot satisfactorilyexplain the evolution from spirals into S0s. Here we explore whether majormergers can provide an alternative way to transform spirals into S0s byanalysing the spiral-spiral major mergers from the GalMer database that lead torealistic, relaxed S0-like galaxies. We find that the change in stellar angularmomentum and concentration can explain the differences in the$\lambda_\mathrm{Re}$--$R_{90}/R_{50}$ plane found by the CALIFA team. Majormergers thus offer a feasible explanation for the transformation of spiralsinto S0s.

Formation of S0 galaxies through mergers: Explaining angular momentum and concentration change from spirals to S0s