Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Abundances of Refractory Elements for G-type Stars with Extrasolar
  Planets   We confirm the difference of chemical abundance between stars with and
without exoplanet, as well as present the relation between chemical abundances
and the physical properties of exoplanets such as planetary mass and semi-major
axis of planetary orbit. We have obtained the spectra of 52 G-type stars with
BOES (BOAO Echelle Spectrograph) and carried out the abundance analysis for 12
elements of Na, Mg, Al, Si, Ca, Sc, Ti, V, Cr, Mn, Co, and Ni. We first have
found that the [Mn/Fe] ratios of planet-host stars are higher than those of
comparisons in the whole metallicity range, and in metal-poor stars of [Fe/H]
$<$ -0.4, the abundance difference have been larger than in metal-rich samples,
especially for the elements of Mg, Al, Sc, Ti, V, and Co. When examined the
relation between planet properties and metallicities of planet-host stars, we
have observed that planet-host stars with low-metallicity tend to bear several
low-mass planets ($< M_J$) instead of a massive gas-giant planet.

21
The categories of this paper are: adap-org
5
The categories of this paper are: gr-qc
34
The categories of this paper are: chem-ph
30
The categories of this paper are: q-alg
36
The categories of this paper are: cmp-lg
3
The categories of this paper are: physics
31
The categories of this paper are: ao-sci
12
The categories of this paper are: nucl-th
22
The categories of this paper are: chao-dyn
28
The categories of this paper are: alg-geom
35
The categories of this paper are: mtrl-th
7
The categories of this paper are: hep-th
33
The categories of this paper are: plasm-ph
23
The categories of this paper are: solv-int
25
The categories of this paper are: patt-sol
9
The categories of this paper are: nlin