Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Spectroscopy of Outlying H II Regions in Spiral Galaxies: Abundances and
  Radial Gradients   We present the results of low dispersion optical spectroscopy of 186 H II
regions spanning a range of radius in 13 spiral galaxies. Abundances for
several elements (oxygen, nitrogen, neon, sulfur, and argon) were determined
for 185 of the H II regions. As expected, low metallicities were found for the
outlying H II regions of these spiral galaxies. Radial abundance gradients were
derived for the 11 primary galaxies; similar to results for other spiral
galaxies, the derived abundance gradients are typically -0.04 to -0.07 dex/kpc.

31
The categories of this paper are: ao-sci
4
The categories of this paper are: cond-mat
5
The categories of this paper are: gr-qc
26
The categories of this paper are: bayes-an
32
The categories of this paper are: atom-ph
0
The categories of this paper are: hep-ph
11
The categories of this paper are: hep-lat
35
The categories of this paper are: mtrl-th
14
The categories of this paper are: math-ph
8
The categories of this paper are: hep-ex
23
The categories of this paper are: solv-int
15
The categories of this paper are: nucl-ex
3
The categories of this paper are: physics
1
The categories of this paper are: cs
9
The categories of this paper are: nlin
28
The categories of this paper are: alg-geom