Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Project VeSElkA: results of abundance analysis for HD53929 and HD63975   Project VeSElkA (Vertical Stratification of Element Abundances) has been
initiated with the aim to detect and study the vertical stratification of
element abundances in the atmosphere of chemically peculiar stars. Abundance
stratification occurs in hydrodynamically stable stellar atmospheres due to the
migration of the elements caused by atomic diffusion. Two HgMn stars, HD53929
and HD63975 were selected from the VeSElkA sample and analysed with the aim to
detect some abundance peculiarities employing the ZEEMAN2 code. We present the
results of abundance analysis of HD53929 and HD63975 observed recently with the
spectropolarimeter ESPaDOnS at Canada-France-Hawaii Telescope. Evidence of
phosphorus vertical stratification was detected in the atmosphere of these two
stars. In both cases, phosphorus abundance increases strongly towards the
superficial layers. The strong overabundance of Mn found in stellar atmosphere
of both stars confirms that they are HgMn type stars.

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The categories of this paper are: q-alg
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The categories of this paper are: eess
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The categories of this paper are: gr-qc
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The categories of this paper are: alg-geom
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The categories of this paper are: q-bio
29
The categories of this paper are: funct-an
0
The categories of this paper are: hep-ph
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The categories of this paper are: math-ph
4
The categories of this paper are: cond-mat
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The categories of this paper are: stat
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The categories of this paper are: solv-int
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The categories of this paper are: nucl-th
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The categories of this paper are: supr-con
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The categories of this paper are: adap-org
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The categories of this paper are: physics
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The categories of this paper are: chao-dyn