J/A+A/416/111 C stars in Wolf-Lundmark-Melotte galaxy (Battinelli+, 2004)
Carbon star survey of Local Group galaxies.
X. Wolf-Lundmark-Melotte a galaxy with an extreme C/M ratio.
Battinelli P., Demers S.
<Astron. Astrophys., 416, 111-118 (2004)>
=2004A&A...416..111B 2004A&A...416..111B
ADC_Keywords: Galaxies, photometry ; Photometry, CCD ; Stars, carbon
Keywords: galaxies: individual: Wold-Lundmark-Melotte -
galaxies: stellar populations - galaxies: structure
Abstract:
We used the CFH12K wide field camera to survey the carbon star
population of the Wolf-Lundmark-Melotte system using the CN-TiO
technique. 149 C stars are identified with a mean =20.28,
corresponding to <MI≥-4.65, a mean luminosity similar to what we
found in other irregular galaxies. Star counts in and around the main
body of WLM reveal that its stellar distribution is quite elliptical
(ε=0.58) with major and minor axes of 26' and 11'. Comparison
of the density profile of C stars and old red giants shows that their
scale lengths differ by only 15% pointing to mixed populations.
Wolf-Lundmark-Melotte is found to be unique among dwarf irregular
galaxies by having essentially a handful of early-type AGB M stars
thus leading to an extreme C/M ratio.
Description:
We list the apparent I magnitude, (R-I) and (CN-TiO) colour indices of
149 carbon stars identified in WLM. The observations were obtained
with the CFH12K camera attached to the CFHT.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 80 149 Positions and photometry of 149 C stars
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See also:
J/AJ/119/2780 : C stars in IC 1613 (Albert+, 2000)
J/AJ/120/1801 : C stars in Pegasus, DDO 210 and Tucana (Battinelli+, 2000)
J/AJ/123/832 : C star population in NGC 6822 (Letarte+, 2002)
J/AJ/125/1298 : C star population in outer disk of M31 (Battinelli+, 2003)
J/A+A/410/795 : Photometry of NGC 3109 carbon stars (Demers+, 2003)
J/AJ/125/3037 : RI photometry of NGC 205 carbon stars (Demers+, 2003)
J/A+A/417/479 : RI photometry of NGC 185 carbon stars (Battinelli+, 2004)
J/A+A/418/33 : RI photometry of C stars in NGC 147 (Battinelli+, 2004)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 6 I6 --- Seq Running number
8- 9 I2 h RAh Right ascension (J2000.0)
11- 12 I2 min RAm Right ascension (J2000.0)
14- 18 F5.2 s RAs Right ascension (J2000.0)
21 A1 --- DE- Declination sign (J2000.0)
22- 23 I2 deg DEd Declination (J2000.0)
25- 26 I2 arcmin DEm Declination (J2000.0)
28- 32 F5.2 arcsec DEs Declination (J2000.0)
35- 40 F6.3 mag Imag I magnitude (Mould filter)
43- 48 F6.3 mag e_Imag Error on I
51- 56 F6.3 mag R-I R-I colour index
59- 64 F6.3 mag e_R-I Error on R-I
67- 72 F6.3 mag CN-TiO CN-TiO colour index
75- 80 F6.3 mag e_CN-TiO Error on CN-TiO
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Acknowledgements: Serge Demers
References:
Albert et al., Paper I 2000AJ....119.2780A 2000AJ....119.2780A Cat. J/AJ/119/2780
Battinelli & Demers, Paper II 2000AJ....120.1801B 2000AJ....120.1801B Cat. J/AJ/120/1801
Demers & Battinelli, Paper III 2002AJ....123..832D 2002AJ....123..832D Cat. J/AJ/123/832
Battinelli et al., Paper V 2003AJ....125.1298B 2003AJ....125.1298B Cat. J/AJ/125/1298
Demers et al., Paper VI 2003AJ....125.3037D 2003AJ....125.3037D Cat. J/AJ/125/3037
Demers et al., Paper VII 2003A&A...410..795D 2003A&A...410..795D Cat. J/A+A/410/795
Battinelli & Demers, Paper IX 2004A&A...417..479B 2004A&A...417..479B Cat. J/A+A/417/479
Battinelli & Demers, Paper VIII 2004A&A...418...33B 2004A&A...418...33B Cat. J/A+A/418/33
(End) Patricia Bauer [CDS] 25-Feb-2004