Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The Chemical Compositions and Evolutionary Status of Red Giants in the
  Open Cluster NGC 752   We present detailed chemical compositions of 10 red giant star members of the
Galactic (open) cluster NGC 752, derived from high-resolution (R $\approx$
60,000), high signal-to-noise ($S/N$ $\geq$ 140) spectra. We confirmed cluster
memberships by measuring the stellar radial velocities, and by deriving model
atmosphere parameters ($T_{eff}$, logg, [Fe/H] and $\xi_{t}$) from equivalent
widths of Fe I, Fe II, Ti I, and Ti II lines. The metallicity we obtained for
NGC 752 ([Fe/H]=$-$0.02$\pm$0.05) is in good agreement with previous studies.
We derived abundances of $\alpha$ (Mg, Si, Ca), light odd-Z (Na, Al), Fe-group
(Sc, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn), $n$-capture (Y, La, Nd, Eu), and
$p$-capture (Li, C, N, O) species for each star. Furthermore, we also derived
abundances of the LiCNO $p$-capture element group and carbon isotopic ratios,
using synthetic spectrum analyses of the Li I 6707~\AA\ resonance doublet, the
[O I] line at 6300~\AA, the CH G-band features near 4311 and 4325 \AA, the
C$_{2}$ bandheads at 5160 and 5631 \AA, and $^{12,13}$CN red system lines in
the 7995$-$8040~\AA\ region. By applying recent isochrones to NGC~752
photometry, and comparing the color-magnitude diagram information to our Li
abundances and \ciso\ ratios, we suggest that the 10 observed red giants can be
separated into three first-ascent, six red-clump and one red horizontal branch
star.

0
The categories of this paper are: hep-ph
30
The categories of this paper are: q-alg
18
The categories of this paper are: econ
21
The categories of this paper are: adap-org
16
The categories of this paper are: stat
25
The categories of this paper are: patt-sol
31
The categories of this paper are: ao-sci
2
The categories of this paper are: math
35
The categories of this paper are: mtrl-th
12
The categories of this paper are: nucl-th
36
The categories of this paper are: cmp-lg
3
The categories of this paper are: physics
19
The categories of this paper are: eess
10
The categories of this paper are: q-bio
32
The categories of this paper are: atom-ph
4
The categories of this paper are: cond-mat