J/A+A/474/35 JKs photometry of C stars in IC10 and WLM (Battinelli+, 2007)
The assessment of the near infrared identification of carbon stars.
I. The Local Group galaxies WLM, IC 10 and NGC 6822.
Battinelli P., Demers S., Mannucci F.
<Astron. Astrophys., 474, 35-41 (2007)>
=2007A&A...474...35B 2007A&A...474...35B (SIMBAD/NED BibCode)
ADC_Keywords: Galaxies, nearby ; Stars, carbon ; Photometry, infrared
Keywords: galaxies: individual: IC 10 - galaxies: individual: WLM -
galaxies: individual: NGC 6822 - stars: carbon -
stars: AGB and post-AGB - galaxies: dwarf
Abstract:
The selection of AGB C and M stars from NIR colours has been done in
recent years using adjustable criteria that are in needs of
standardization if one wants to compare, in a coherent manner,
properties of various populations. We intend to assess the NIR colour
technique to identify C and M stars. We compare the NIR colours of
several C stars previously identified from spectroscopy or narrow band
techniques in WLM, IC 10 and NGC 6822. We demonstrate that very few M
stars have (J-K)0>1.4 but a non negligible number of C stars are
bluer than this limit. Thus, counts of M and C stars based on such
limit do not produce pure samples. C/M ratios determined from NIR
colours must be regarded as underestimates mainly because the M
numbers include many warm C stars and also K stars if no blue limit is
considered.
Description:
The J,H,Kp observations were secured with NICS (Near Infrared
Camera Spectrometer) installed at the Nasmyth focus of the TNG
(Telescopio Nazionale Galileo) on the island of La Palma.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 59 62 Known C stars in the WLM NICS field
table3.dat 59 52 Known C stars in the IC 10 NICS field
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See also:
J/A+A/416/111 : C stars in Wolf-Lundmark-Melotte galaxy (Battinelli+, 2004)
J/A+A/424/125 : Carbon stars in IC10 (Demers+, 2004)
J/A+A/466/501 : JKs photometry of WLM galaxy carbon stars (Valcheva+, 2007)
J/A+A/493/1075 : JKs photometry of IC1613 & NGC3109 C stars (Battinelli+ 2009)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- [BD2004a] Sequential number from Battinelli & Demers,
2004, Cat. J/A+A/416/111
5- 10 F6.3 mag Imag I magnitude
12- 16 F5.3 mag R-I R-I colour index
18- 22 F5.3 mag CN-TiO CN-TiO index
24- 29 F6.3 mag Ksmag Ks magnitude
31- 35 F5.3 mag e_Ksmag rms uncertainty on Ksmag
37- 41 F5.3 mag J-Ks J-Ks colour index
43- 47 F5.3 mag e_J-Ks rms uncertainty on J-Ks
49- 53 F5.3 mag H-Ks H-Ks colour index
55- 59 F5.3 mag e_H-Ks rms uncertainty on H-Ks
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- [DBL2004] Sequential number from Demers et al., 2004,
Cat. J/A+A/424/125
5- 10 F6.3 mag I0mag Dereddened I magnitude
12- 16 F5.3 mag (R-I)0 Dereddened R-I colour index
18- 22 F5.3 mag CN-TiO CN-TiO index
24- 29 F6.3 mag Ksmag Ks magnitude
31- 35 F5.3 mag e_Ksmag rms uncertainty on Ksmag
37- 41 F5.3 mag J-Ks J-Ks colour index
43- 47 F5.3 mag e_J-Ks rms uncertainty on J-Ks
49- 53 F5.3 mag H-Ks H-Ks colour index
55- 59 F5.3 mag e_H-Ks rms uncertainty on H-Ks
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History:
From electronic version of the journal
References:
Battinelli & Demers, Paper II 2009A&A...493.1075B 2009A&A...493.1075B, Cat. J/A+A/493/1075
(End) Patricia Vannier [CDS] 05-Feb-2018