J/AJ/138/1508 2MASS large-amplitude variable stars (Kouzuma+, 2009)
Properties of large-amplitude variable stars detected with
Two Micron All Sky Survey public images.
Kouzuma S., Yamaoka H.
<Astron. J., 138, 1508-1519 (2009)>
=2009AJ....138.1508K 2009AJ....138.1508K
ADC_Keywords: Stars, variable ; Infrared sources ; Photometry, infrared
Keywords: stars: AGB and post-AGB - stars: variables: other - Galaxy: bulge -
Galaxy: structure
Abstract:
We present a catalog of variable stars in the near-infrared wavelength
detected with overlapping regions of the Two Micron All Sky Survey
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 six are already known and 118 are distributed in the |b|<5°
region. Additionally, 84 variable stars have optical counterparts in
Digitized Sky Survey images. The three diagrams (color-magnitude,
light variance, and color-color diagrams) indicate that most of the
detected variable stars should be large-amplitude 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.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 87 136 List of 2MASS variables
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See also:
II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- Seq Sequential number <[KY2009] NNN> in Simbad
5- 6 I2 h RAh Right Ascension J2000 (hours)
8- 9 I2 min RAm Right Ascension J2000 (minutes)
11- 14 F4.1 s RAs Right Ascension J2000 (seconds)
16 A1 --- DE- Declination J2000 (sign)
17- 18 I2 deg DEd Declination J2000 (degrees)
20- 21 I2 arcmin DEm Declination J2000 (minutes)
23- 26 F4.1 arcsec DEs Declination J2000 (seconds)
28- 33 F6.3 mag Jmag 2MASS J magnitude
35- 40 F6.3 mag Hmag 2MASS H magnitude
42- 47 F6.3 mag Kmag 2MASS Ks magnitude
49- 54 F6.4 mag AK Extinction at Ks-band
56- 59 F4.2 mag dJmag ?=- Light variance between two epoch
measurements
61- 63 I3 d dEp Interval between two epochs (days)
65- 74 F10.6 deg GLON [-90/90] Galactic longitude
76- 85 F10.6 deg GLAT Galactic latitude
87 I1 --- OC [0/1] Optical counterpart in DSS images:
0=none can be seen, 1=coutnerpart seen
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Acknowledgements:
S. Kouzuma, skouzuma(at)lets.chukyo-u.ac.jp
(End) Patricia Vannier [CDS] 06-Sep-2011