Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Chemical abundances of three new Ba stars from the Keck/HIRES spectra   Based on high resolution, high signal-to-noise (S/N) ratio spectra from
Keck/HIRES, we have determined abundances of 20 elements for 18 Ba candidates.
The parameter space of these stars are in the range of 4880 $\leq$
$\rm{T_{eff}}$ $\leq$ 6050 K, 2.56 $\leq$ log $g$ $\leq$ 4.53 dex and -0.27
$\leq$ [Fe/H] $\leq$ 0.09 dex. It is found that four of them can be identified
as Ba stars with [s/Fe] $>$ 0.25 dex (s: Sr, Y, Zr, Ba, La, Ce and Nd), and
three of them are newly discovered, which includes two Ba giants (HD 16178 and
HD 22233) and one Ba subgiant (HD 2946). Our results show that the abundances
of $\alpha$, odd and iron-peak elements (O, Na, Mg, Al, Si, Ca, Sc, Ti, Mn, Ni
and Cu) for our program stars are similar to those of the thin disk, while the
distribution of [hs/ls] (hs: Ba, La, Ce and Nd, ls: Sr, Y and Zr) ratios of our
Ba stars is similar to those of the known Ba objects. None of the four Ba stars
show clear enhancement in carbon including the known CH subgiant HD 4395. It is
found that three of the Ba stars present clear evidences of hosting stellar or
sub-stellar companions from the radial velocity data.

31
The categories of this paper are: ao-sci
12
The categories of this paper are: nucl-th
14
The categories of this paper are: math-ph
36
The categories of this paper are: cmp-lg
13
The categories of this paper are: quant-ph
17
The categories of this paper are: q-fin
7
The categories of this paper are: hep-th
10
The categories of this paper are: q-bio
33
The categories of this paper are: plasm-ph
35
The categories of this paper are: mtrl-th
8
The categories of this paper are: hep-ex
9
The categories of this paper are: nlin
22
The categories of this paper are: chao-dyn
5
The categories of this paper are: gr-qc
11
The categories of this paper are: hep-lat
19
The categories of this paper are: eess