Simulations of shell galaxies with GADGET-2: Multi-generation shell   systems
  As the missing complement to existing studies of shell galaxies, we carried out a set of self-consistent N-body simulations of a minor merger forming a stellar shell system within a giant elliptical galaxy. We discuss the effect of a phenomenon possibly associated with the galaxy merger simulations --- a presence of multiple generations of shells. 
Kate\v{r}ina Barto\v{s}kov\'a, Bruno Jungwiert, Ivana Ebrov\'a, Lucie   J\'ilkov\'a, Miroslav K\v{r}\'i\v{z}ek
astro-ph.GA astro-ph.CO