Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Abundances of lithium, sodium, and potassium in Vega   Vega's photospheric abundances of Li, Na, and K were determined by using
considerably weak lines measured on the very high-S/N spectrum, while the
non-LTE correction and the gravity-darkening correction were adequately taken
into account. It was confirmed that these alkali elements are mildly
underabundant ([Li/H] ~ -0.6, [Na/H] ~ -0.3, and [K/H] ~ -0.2) compared to the
solar system values, as generally seen also in other metals. Since the tendency
of Li being more deficient than Na and K is qualitatively similar to what is
seen in typical interstellar cloud, the process of interstellar gas accretion
may be related with the abundance anomaly of Vega, as suspected in the case of
lambda Boo stars.

26
The categories of this paper are: bayes-an
11
The categories of this paper are: hep-lat
35
The categories of this paper are: mtrl-th
30
The categories of this paper are: q-alg
8
The categories of this paper are: hep-ex
34
The categories of this paper are: chem-ph
23
The categories of this paper are: solv-int
29
The categories of this paper are: funct-an
5
The categories of this paper are: gr-qc
17
The categories of this paper are: q-fin
12
The categories of this paper are: nucl-th
18
The categories of this paper are: econ
0
The categories of this paper are: hep-ph
10
The categories of this paper are: q-bio
9
The categories of this paper are: nlin
25
The categories of this paper are: patt-sol