Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On Be Star Candidates and Possible Blue Pre-Main Sequence Objects in the
  Small Magellanic Cloud   Recently the OGLE experiment has provided accurate light curves and colours
for about 2 millions stars in the Small Magellanic Cloud. We have examined this
database for its content of Be stars, applying some selection criteria, and we
have found a sample of $\sim$ 1000 candidates. Some of these stars show
beautiful light curves with amazing variations never observed in any Galactic
variable. We find outbursts in 13% of the sample (Type-1 stars), high and low
states in 15%, periodic variations in 7%, and the usual variations seen in
Galactic Be stars in 65% of the cases. The Galactic counterparts of Type-1
objects could be the outbursting Be stars found by Hubert & Floquet (1998)
after the analysis of Hipparcos photometry. We discuss the possibility that
Type-1 stars could correspond to Be stars with accreting white dwarf companions
or alternatively, blue pre-main sequence stars surrounded by thermally unstable
accretion disks. We provide coordinates and basic photometric information for
these stars and some examples of light curves.

22
The categories of this paper are: chao-dyn
20
The categories of this paper are: acc-phys
27
The categories of this paper are: comp-gas
21
The categories of this paper are: adap-org
34
The categories of this paper are: chem-ph
29
The categories of this paper are: funct-an
30
The categories of this paper are: q-alg
36
The categories of this paper are: cmp-lg
35
The categories of this paper are: mtrl-th
15
The categories of this paper are: nucl-ex
17
The categories of this paper are: q-fin
31
The categories of this paper are: ao-sci
14
The categories of this paper are: math-ph
16
The categories of this paper are: stat
37
The categories of this paper are: supr-con
7
The categories of this paper are: hep-th