3D-Spectroscopy of extragalactic planetary nebulae as diagnostic probes   for galaxy evolution
  In addition to study extragalactic stellar populations in their integrated light, the detailed analysis of individual resolved objects has become feasible, mainly for luminous giant stars and for extragalactic planetary nebulae (XPNe) in nearby galaxies. A recently started project at the Astrophysical Institute Potsdam (AIP), called ``XPN--Physics'', aims to verify if XPNe are useful probes to measure the chemical abundances of their parent stellar population. The project involves theoretical and observational work packages. 
Andreas Kelz, Ana Monreal-Ibero, Martin M. Roth, Christer Sandin,   Detlef Schoenberner, Matthias Steffen (Astrophysical Ins...