J/AJ/120/1801 C stars in Pegasus, DDO 210 and Tucana (Battinelli+, 2000)
A carbon star survey of the Local Group dwarf galaxies.
II. Pegasus, DDO 210, and Tucana.
Battinelli P., Demers S.
<Astron. J. 120, 1801 (2000)>
=2000AJ....120.1801B 2000AJ....120.1801B
ADC_Keywords: Stars, carbon ; Photometry, Cousins ; Photometry, CCD
Keywords: galaxies: individual (DDO 210, Pegasus, Tucana) -
galaxies: stellar content - stars: carbon
Abstract:
We present the latest results of our ongoing four-filter photometric
survey of C stars in Local Group dwarf irregular galaxies.
Observations of the two low-luminosity dwarf irregular galaxies,
Pegasus and DDO 210, revealed 40 and three C stars, respectively,
assuming that the reddening of Pegasus is negligible. No C stars were
identified in Tucana. Our observations permit the estimation of the
color-magnitude diagram contamination by foreground M dwarfs thus
yielding reliable C/M ratios. Our R and I photometry of the C stars
cannot be used to solve the extinction controversy toward Pegasus. The
three C stars in DDO 210 are quite bright when compared with C star
populations in other dwarf galaxies. A larger, fainter population in
that galaxy seems improbable, however. The statistics of C stars
currently on hand for dwarf galaxies show a well-defined trend with
the absolute magnitude of dwarf galaxies.
Description:
The observations presented in this paper were obtained at the Cerro
Tololo Inter-American Observatory's (CTIO) 1.5m telescope with a
2048x2048 Tek CCD during a five night run in 1999 August.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table4.dat 64 40 C stars in Pegasus
table5.dat 64 3 C stars in DDO 210
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See also:
J/AJ/119/2780 : C stars in IC 1613 (Albert+, 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/416/111 : C stars in Wolf-Lundmark-Melotte galaxy (Battinelli+, 2004)
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: table4.dat table5.dat
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Bytes Format Units Label Explanations
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1- 3 A3 --- Seq Sequential number (CNN) (1)
5- 6 I2 h RAh Right ascension (J2000)
8- 9 I2 min RAm Right ascension (J2000)
11- 15 F5.2 s RAs Right ascension (J2000)
17 A1 --- DE- Declination sign (J2000)
18- 19 I2 deg DEd Declination (J2000)
21- 22 I2 arcmin DEm Declination (J2000)
24- 27 F4.1 arcsec DEs Declination (J2000)
29- 34 F6.3 mag Icmag Kron-Cousin I magnitude
36- 40 F5.3 mag e_Icmag rms uncertainty on Imag
42- 46 F5.3 mag Rc-Ic Kron-Cousin R-I colour index
48- 52 F5.3 mag e_Rc-Ic rms uncertainty on R-I
54- 58 F5.3 mag CN-TiO CN-TiO index
60- 64 F5.3 mag e_CN-TiO rms uncertainty on CN-TiO
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Note (1): Simbad nomenclature:
Table 4: [BD2000] Pegasus CNN
Table 5: [BD2000] DDO 210 CNN
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History:
From electronic version of the journal
References:
Albert et al., Paper I 2000AJ....119.2780A 2000AJ....119.2780A Cat. J/AJ/119/2780
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 VIII 2004A&A...418...33B 2004A&A...418...33B Cat. J/A+A/418/33
Battinelli & Demers, Paper IX 2004A&A...417..479B 2004A&A...417..479B Cat. J/A+A/417/479
Battinelli & Demers, Paper X 2004A&A...416..111B 2004A&A...416..111B Cat. J/A+A/416/111
(End) Patricia Bauer [CDS] 10-Jun-2003