Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Kinematics and chemical abundances of the B star HD 28248   We perform a detailed elemental abundance study of the early-type B star HD
28248 and estimate its orbital path in the Galaxy. From the comparison of
spectroscopic observations performed at the European Southern Observatory at La
Silla in 2001/Oct/07 with non-LTE synthetic spectra using a new wrapper for the
simultaneous fitting of several lines of a given atomic species, the abundances
of He, C, N, O, Mg, Al, Si, P, S, Ar and Fe were determined for the first time.
The radial velocity of HD 28248 has been also estimated from the positions of
centroids of nine neutral helium lines and Mg ii 4481 A, allowing to calculate
its right-handed Galactic space-velocity components U, V and W and estimate its
orbital path in the Galaxy for the first time. Our chemical analysis depicted
an outstanding enrichment of several atomic species, particularly [Fe/H] =
+0.25 dex and [O/Fe] = +0.32 dex. The kinematic parameters show that its orbit
is confined to the galactic disk with a scale height of 400 pc and the star has
moved about 4 kpc from its birthplace to the current position. The elemental
abundances do not follow the predicted [Fe/H] and [O/Fe] gradients currently
established for the Galaxy. A hypothetical scenario for the contamination could
be the mass transfer in a binary system during previous evolutionary phases.

25
The categories of this paper are: patt-sol
27
The categories of this paper are: comp-gas
32
The categories of this paper are: atom-ph
20
The categories of this paper are: acc-phys
24
The categories of this paper are: dg-ga
14
The categories of this paper are: math-ph
12
The categories of this paper are: nucl-th
9
The categories of this paper are: nlin
19
The categories of this paper are: eess
11
The categories of this paper are: hep-lat
29
The categories of this paper are: funct-an
7
The categories of this paper are: hep-th
5
The categories of this paper are: gr-qc
33
The categories of this paper are: plasm-ph
10
The categories of this paper are: q-bio
1
The categories of this paper are: cs