Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Open clusters in the Gaia-ESO Survey tracing the chemical history of the
  Milky Way   The Gaia-ESO Survey (GES) is a large public spectroscopic survey that aims at
observing with FLAMES@VLT the main stellar components of our Galaxy. The study
of the population of open clusters is one of the main objectives of GES. We
present some results from the first 18 months of observations, among them, a
preliminary view of the radial metallicity gradient as traced by open cluster
data and a comparison of the chemical patterns of clusters located in different
parts of the Galactic disk.

13
The categories of this paper are: quant-ph
1
The categories of this paper are: cs
22
The categories of this paper are: chao-dyn
0
The categories of this paper are: hep-ph
2
The categories of this paper are: math
14
The categories of this paper are: math-ph
32
The categories of this paper are: atom-ph
30
The categories of this paper are: q-alg
18
The categories of this paper are: econ
23
The categories of this paper are: solv-int
35
The categories of this paper are: mtrl-th
20
The categories of this paper are: acc-phys
29
The categories of this paper are: funct-an
26
The categories of this paper are: bayes-an
25
The categories of this paper are: patt-sol
4
The categories of this paper are: cond-mat