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J/A+A/424/125       Carbon stars in IC10                     (Demers+, 2004)

A carbon star approach to IC 10: Distance and correct size. Demers S., Battinelli P., Letarte B <Astron. Astrophys. 424, 125 (2004)> =2004A&A...424..125D
ADC_Keywords: Galaxies, photometry ; Photometry, CCD ; Stars, carbon Keywords: galaxies: individual: IC 10 - stars: carbon - galaxies: local group - galaxies: structure Abstract: We present wide field CFH12K observations of the highly reddened Local Group galaxy IC 10. Using R,I,CN and TiO filters we identify 676 carbon stars in the field of IC 10. After mapping the reddening in the field, from the colours of the G dwarfs seen along the line of sight, we determine the mean apparent magnitude of the C star population to be <I0≥19.78, leading to a true modulus of (m-M)0=24.35±0.11 (741±37kpc). The old red giant stars define an asymmetric halo. With a halo diameter of at least 30', IC 10 is among the largest dwarfs of the Local Group. The surface density of C stars follows a radial power law with a scale length of 2.36', a value nearly identical to the scale length defined by the old giants thus IC 10 has a stellar halo where the old and intermediate-age populations are well mixed. Description: The results presented here are based on observations obtained, in Service Queue observing mode in August 2002, with the CFH12K camera installed at the prime focus of the 3.66m Canada-France-Hawaii Telescope. Images were obtained through Mould I and R filters and narrow band CN and TiO filters, centered at 808.6nm and 768.9 nm, respectively. Objects: ----------------------------------------- RA (2000) DE Designation(s) ----------------------------------------- 00 20 23.2 +59 17 35 IC 10 ----------------------------------------- File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table2.dat 80 676 Positions and photometry of 676 C stars
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/AJ/125/3037 : RI photometry of NGC 205 carbon stars (Demers+, 2003) J/A+A/410/795 : Photometry of NGC 3109 carbon stars (Demers+, 2003) J/A+A/418/33 : RI photometry of C stars in NGC 147 (Battinelli+, 2004) J/A+A/417/479 : RI photometry of NGC 185 carbon stars (Battinelli+, 2004) J/A+A/416/111 : C stars in Wolf-Lundmark-Melotte galaxy (Battinelli+, 2004) Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
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 I0 Mould I magnitude (822.3nm), corrected for extinction 43- 48 F6.3 mag e_I0 Error on I0 51- 56 F6.3 mag (R-I)0 Mould R-I colour index, corrected for reddening 59- 64 F6.3 mag e_(R-I)0 Error on (R-I)0 67- 72 F6.3 mag CN-TiO CN-TiO colour index 75- 80 F6.3 mag e_CN-TiO Error on CN-TiO
Acknowledgements: Serge Demers References: Albert et al., Paper I 2000AJ....119.2780A, Cat. J/AJ/119/2780 Battinelli & Demers, Paper II 2000AJ....120.1801B, Cat. J/AJ/120/1801 Demers & Battinelli, Paper III 2002AJ....123..832D Cat. J/AJ/123/832 Battinelli et al., Paper V 2003AJ....125.1298B, Cat. J/AJ/125/1298 Demers et al., Paper VI 2003AJ....125.3037D, Cat. J/AJ/125/3037 Demers et al., Paper VII 2003A&A...410..795D, Cat. J/A+A/410/795 Battinelli & Demers, Paper VIII 2004A&A...418...33B, Cat. J/A+A/418/33 Battinelli & Demers, Paper IX 2004A&A...417..479B, Cat. J/A+A/417/479 Battinelli & Demers, Paper X 2004A&A...416..111B, Cat. J/A+A/416/111
(End) Serge Demers [Univ. Montreal], Patricia Vannier [CDS] 01-Sep-2004
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