J/AJ/125/1298 C star population in outer disk of M31 (Battinelli+, 2003)
Carbon star survey in the Local Group. V. The outer disk of M31.
Battinelli P., Demers S., Letarte B.
<Astron. J. 125, 1298 (2003)>
=2003AJ....125.1298B 2003AJ....125.1298B
ADC_Keywords: Stars, carbon ; Photometry, UBVRI
Keywords: galaxies: individual (M31) - galaxies: stellar content -
galaxies: structure - stars: carbon
Abstract:
We employ the CFH12K mosaic to identify carbon stars, using the R, I,
CN, and TiO photometric technique, in a 2240 arcmin2 area, ranging
from 17 to 30kpc of the southwest disk of M31, barely reaching the
edge of the observed H I disk. We found 945 C stars with
<I0≥19.94mag and σ=0.47. The surface density of C stars along
the major axis of M31 follows an exponential profile with a scale
length of 4.85±0.35kpc, in agreement with adopted values for the
scale length of the disk population. Our survey partially overlaps
with the recently discovered G1 density enhancement by Ferguson et al.
We confirm that no AGB star excess is detectable in the surveyed part
of the clump. The C/M ratio, along the major axis, is derived over a
distance range of 7kpc. The strong C/M gradient seen contrasts with
results of previous studies of the C stars in M31.
Description:
We observed two fields in the southern outer disk of Andromeda with
the CFH12K during two nights of 2000 September. Images were obtained
through Mould I, R filters and the narrowband CN, TiO filters,
centered at 808.6nm and 768.9nm, respectively.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table3.dat 65 25 Carbon stars in SW1 and SW2
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See also:
J/AJ/119/2780 : C star in 1613 (Albert+, 2003)
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/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: table3.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- [BDL2003] Sequential number
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- 28 F5.2 arcsec DEs Declination (J2000)
30- 35 F6.3 mag Imag Mould I magnitude
37- 41 F5.3 mag e_Imag rms uncertainty on Imag
43- 47 F5.3 mag R-I Mould R-I colour index
49- 53 F5.3 mag e_R-I rms uncertainty on R-I
55- 59 F5.3 mag CN-TiO CN-TiO index
61- 65 F5.3 mag e_CN-TiO rms uncertainty on CN-TiO
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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
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
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