Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: 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.

18
The categories of this paper are: econ
19
The categories of this paper are: eess
26
The categories of this paper are: bayes-an
11
The categories of this paper are: hep-lat
3
The categories of this paper are: physics
35
The categories of this paper are: mtrl-th
34
The categories of this paper are: chem-ph
4
The categories of this paper are: cond-mat
37
The categories of this paper are: supr-con
2
The categories of this paper are: math
7
The categories of this paper are: hep-th
5
The categories of this paper are: gr-qc
24
The categories of this paper are: dg-ga
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The categories of this paper are: chao-dyn
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The categories of this paper are: alg-geom
31
The categories of this paper are: ao-sci