Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A Quest for PMS candidate stars at low metallicity: Variable HAe/Be and
  Be stars in the Small Magellanic Cloud   We report the discovery of 5 new Herbig Ae/Be candidate stars in the Small
Magellanic Cloud in addition to the 2 reported in Beaulieu et al. (2001). We
discuss these 7 HAeBe candidate stars in terms of (1) their irregular
photometric variability, (2) their near infrared emission, (3) their Halpha
emission and (4) their spectral type. One star has the typical photometric
behaviour that is observed only among Pre-Main Sequence UX Orionis type stars.
The objects are more luminous than Galactic HAeBe stars and Large Magellanic
Cloud HAeBe candidates of the same spectral type. The stars were discovered in
a systematic search for variable stars in a subset of the EROS2 database
consisting of 115,612 stars in a field of 24x24 arcmin in the Small Magellanic
Cloud. In total we discovered 504 variable stars. After classifying the
different objects according to their type of variability, we concentrate on 7
blue objects with irregular photometric behaviour. We cross-identified these
objects with emission line catalogues from Simbad and JHK photometry from
2MASS. The analysis is supplemented with obtained narrow and broad band
imaging. We discuss their variability in terms of dust obscuration and
bound-free and free-free emission. We estimate the influence of metallicity on
the circumstellar dust emission from pre-main sequence stars.

18
The categories of this paper are: econ
10
The categories of this paper are: q-bio
28
The categories of this paper are: alg-geom
25
The categories of this paper are: patt-sol
30
The categories of this paper are: q-alg
23
The categories of this paper are: solv-int
11
The categories of this paper are: hep-lat
24
The categories of this paper are: dg-ga
16
The categories of this paper are: stat
34
The categories of this paper are: chem-ph
2
The categories of this paper are: math
3
The categories of this paper are: physics
21
The categories of this paper are: adap-org
35
The categories of this paper are: mtrl-th
13
The categories of this paper are: quant-ph
7
The categories of this paper are: hep-th