Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The blue straggler S1082: a triple system in the old open cluster M67   We present a photometric and spectroscopic study of the blue straggler S1082
in the open cluster M67. Our observations confirm the previously reported 1.07
day eclipse light curve and the absence of large radial-velocity variations of
the narrow-lined star. However, we find two more spectral components which do
vary on the 1.07 day period. We conclude that the system is triple. We fit the
light and radial-velocity curves and find that the total mass of the inner
binary is more than twice the turnoff mass and that the outer companion to the
binary is a blue straggler on its own account. We briefly discuss formation
scenarios for this multiple system.

15
The categories of this paper are: nucl-ex
21
The categories of this paper are: adap-org
7
The categories of this paper are: hep-th
29
The categories of this paper are: funct-an
32
The categories of this paper are: atom-ph
30
The categories of this paper are: q-alg
12
The categories of this paper are: nucl-th
27
The categories of this paper are: comp-gas
20
The categories of this paper are: acc-phys
14
The categories of this paper are: math-ph
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The categories of this paper are: eess
31
The categories of this paper are: ao-sci
28
The categories of this paper are: alg-geom
34
The categories of this paper are: chem-ph
18
The categories of this paper are: econ
1
The categories of this paper are: cs