Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A Few Binary Star Puzzles for Roberto on the Occasion of His Birthday   Radial velocity observations accumulated during the past 16 years are used to
derive a preliminary orbit for the CEMP star CS 22881-036. The velocity
amplitude is very small. No velocity variation is found for three additional
CEMP stars observed over roughly the same time interval. Searches for
companions of two CEMP double-lined spectroscopic binaries and of the RR Lyrae
star TY Gruis are reviewed. A disparity between the period distribution of disk
carbon-star binaries and that of their parent population of normal binaries can
be attributed qualitatively to a decline in accreted mass with increasing
binary separation. Finally, possible reasons for failure to find expected
companions of CEMP stars are discussed.

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The categories of this paper are: bayes-an
18
The categories of this paper are: econ
34
The categories of this paper are: chem-ph
31
The categories of this paper are: ao-sci
29
The categories of this paper are: funct-an
0
The categories of this paper are: hep-ph
16
The categories of this paper are: stat
12
The categories of this paper are: nucl-th
21
The categories of this paper are: adap-org
28
The categories of this paper are: alg-geom
2
The categories of this paper are: math
13
The categories of this paper are: quant-ph
10
The categories of this paper are: q-bio
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The categories of this paper are: comp-gas
11
The categories of this paper are: hep-lat
17
The categories of this paper are: q-fin