Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Properties of Large-Amplitude Variable Stars Detected With Two Micron
  All Sky Survey Public Images   We present a catalogue of variable stars in the near-infrared wavelength
detected with overlapping regions of the 2MASS public images, and discuss their
properties. The investigated region is in the direction of the Galactic center
(-30 < l < 20, |b| < 20), which covers the entire bulge. We have detected 136
variable stars, of which 6 are already-known and 118 are distributed in |b| < 5
region. Additionally, 84 variable stars have optical counterparts in DSS
images. The three diagrams (colour-magnitude, light variance and colour-colour
diagrams) indicate that most of the detected variable stars should be
largeamplitude and long-period variables such as Mira variables or OH/IR stars.
The number density distribution of the detected variable stars implies that
they trace the bar structure of the Galactic bulge.

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The categories of this paper are: gr-qc
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The categories of this paper are: stat
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The categories of this paper are: comp-gas
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The categories of this paper are: patt-sol
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The categories of this paper are: dg-ga
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The categories of this paper are: eess
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The categories of this paper are: quant-ph
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The categories of this paper are: q-alg
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The categories of this paper are: solv-int
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The categories of this paper are: nucl-ex
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The categories of this paper are: alg-geom
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The categories of this paper are: q-bio
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The categories of this paper are: bayes-an
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The categories of this paper are: hep-th
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The categories of this paper are: plasm-ph
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The categories of this paper are: cond-mat