J/A+A/568/A100 Photometric monitoring of halo C stars (Battinelli+, 2014)
Miras among C stars.
Battinelli P., Demers S.
<Astron. Astrophys. 568, A100 (2014)>
=2014A&A...568A.100B 2014A&A...568A.100B
ADC_Keywords: Stars, variable ; Stars, carbon ; Photometry
Keywords: stars: AGB and post-AGB - stars: carbon - stars: variables: general -
Galaxy: halo
Abstract:
Carbon stars are among the brightest intermediate-age stars. They are
seen in nearly all galaxies of the Local Group. In the Milky Way they
are members of the thin disk but over a hundred have been identified
in the Galactic halo. Since the halo consists essentially of an old
stellar population, these carbon stars warrant special attention. We
believe that such stars are trespassers and belong to streams left
over by disrupted dwarf spheroidal galaxies.
By performing photometric monitoring we intend to identify Miras among
the halo carbon stars.
We obtained, over several semesters, K and J images centered on the
carbon stars in order to determine their variation and periodicity.
Description:
The table contains the K and J magnitudes of Galactic Halo carbon
stars which were monitored during nearly two years.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 82 19 Mean magnitudes and color of program stars
halo_var.dat 27 327 Near-IR photometric monitoring of halo C stars
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Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 4 A4 --- Name Star number from Mauron's list
6- 10 F5.2 mag <Kmag> Mean K magnitude
12- 16 F5.2 mag <Jmag> Mean J magnitude
18- 19 I2 --- o_<Kmag> [8/21] Number of observations in K band
21- 22 I2 --- o_<Jmag> [10/33] Number of observations in J band
24- 27 F4.2 mag <J-K> Mean colour index J-K
29- 32 F4.2 mag E(J-K) J-K colour excess
34- 35 I2 h RAh Simbad Right ascension (J2000)
37- 38 I2 min RAm Simbad Right ascension (J2000)
40- 45 F6.3 s RAs Simbad Right ascension (J2000)
47 A1 --- DE- Simbad Declination sign (J2000)
48- 49 I2 deg DEd Simbad Declination (J2000)
51- 52 I2 arcmin DEm Simbad Declination (J2000)
54- 58 F5.2 arcsec DEs Simbad Declination (J2000)
60- 64 A5 --- --- [2MASS]
66- 82 A17 --- 2MASS 2MASS star name
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Byte-by-byte Description of file: halo_var.dat
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Bytes Format Units Label Explanations
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1- 7 F7.2 d MJD [5323/6662] Modified Julian Days (MJD-50000)
10- 15 F6.3 mag Kmag ?=0 K magnitude
17- 21 F5.2 mag Jmag ?=0 J magnitude
24- 27 A4 ---- Name Star number from Mauron's list
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Acknowledgements:
Paolo Battinelli, battinel(at)inaf.it
(End) Patricia Vannier [CDS] 29-Aug-2014