J/PASP/117/199 IRTS carbon stars (Le Bertre+, 2005)
Carbon stars in the Infrared Telescope in Space Survey.
Le Bertre T., Tanaka M., Yamamura I., Murakami H., MacConnell D.J.
<Publ. Astron. Soc. Pac., 117, 199-206 (2005)>
=2005PASP..117..199L 2005PASP..117..199L
ADC_Keywords: Stars, carbon ; Photometry, infrared
Abstract:
We have identified 139 cool carbon stars in the near-infrared
spectrophotometric survey of the Infrared Telescope in Space (IRTS)
from the conspicuous presence of molecular absorption bands at 1.8,
3.1, and 3.8µm. Among them, 14 are new bright (K∼4.0-7.0) Carbon
stars. We find a trend relating the 3.1µm band strength to the
(K-L') color index, which is known to correlate with mass-loss rate.
This could be an effect of a relation between the depth of the
3.1µm feature and the degree of development of the extended stellar
atmosphere where dust starts to form.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 69 143 IRTS carbon stars
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See also:
III/227 : General Cat. of galactic Carbon stars, 3d Ed. (Alksnis+ 2001)
J/A+A/227/82 : JHKLM photometry of 'IRAS-discovered' stars (Epchtein+, 1990)
J/A+A/324/1059 : C-rich stars IR and UBVRI photometry (Le Bertre 1997)
J/A+A/334/609 : Carbon stars IR photometry (Guglielmo+ 1998)
J/A+A/376/997 : Galactic mass-losing AGB stars (Le Bertre+, 2001)
J/A+A/369/178 : Effective temperatures of carbon-rich stars (Bergeat+, 2001)
J/A+AS/99/31 : Identification of C stars in IRAS (Guglielmo+ 1993)
J/PASP/115/351 : Infrared Southern Cool Carbon Stars (MacConnell, 2003)
J/A+A/403/943 : Galactic mass-losing AGB stars. II. (Le Bertre+, 2003)
J/ApJS/112/557 : Classification of IRAS Sources (Kwok+ 1997)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 10 A10 --- NIRS NIRS (Near-Infrared Spectrometer) name
([LTY2003] NIRS HHMMm+DDMM in Simbad)
12 A1 --- m_NIRS [NS] Multiplicity flag on NIRS
14- 19 F6.2 deg GLON Galactic longitude
21- 26 F6.2 deg GLAT Galactic latitude
28- 31 F4.2 mag Kmag K band magnitude
33- 36 F4.2 mag K-L' K-L' color index
38- 41 F4.2 --- 3.1um 3.1µm index (1)
43- 52 A10 --- IRAS IRAS name
54- 57 A4 --- --- [CGCS]
59- 62 I4 --- CGCS ? CGCS number (Cat. III/227)
64- 69 A6 --- Com Comments (2)
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Note (1): To identify carbon stars in the NIRS PSC (Near-Infrared Spectrometer
Point Source Catalog), we use the 3.1µm index defined in Paper II
(2003, Cat. J/A+A/403/943). This index gives the depth of the band
(at 3.1µm) relative to the continuum (taken at 2.9 and 3.3µm);
the maximum depth is obtained for an index value of 0.0, whereas a
value 0.5 indicates a flat spectrum.
Note (2): Comments, defined as follows:
a = A 30 minute exposure plate obtained by D.J. MacConnell shows nothing at
this position. The R DSS2 plate has a faint star 3" southeast of the
IRAS position.
b = A 30 minute exposure plate obtained by D.J. MacConnell shows a faint
continuum (short and red) that has a general character of a carbon star
but is too underexposed to be certain, although it has been tentatively
identified as a C star by MacConnell (1979A&AS...38..335M 1979A&AS...38..335M). The R DSS2
plate has a bright star at the IRAS position.
c = A 60 minute exposure plate obtained by D.J. MacConnell shows nothing at
the IRAS position.
d = The 2.9-3.5m spectrum was also presented by Groenewegen et al.
(1994A&A...287..163G 1994A&A...287..163G).
e = A 60 minute exposure plate obtained by D.J. MacConnell has a very red,
non-C star east of the IRAS position, which probably corresponds to the
bright star 32" away at position angle 66° on the DDS2 I plate.
f = LRS spectrum C (11µm SiC emission; Kwok et al. 1997,
Cat. J/ApJS/112/557); tentative identification as a C star by Chen &
Chen (2003AJ....125.2215C 2003AJ....125.2215C)
g = The 3.1µm index is larger than 0.45 (2003, Cat. J/A+A/403/943).
h = The 3.1µm index is larger than 0.45 (M. Tanaka et al. 2005,
in preparation).
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History:
From electronic version of the journal
References:
Le Bertre et al., Paper I 2001A&A...376..997L 2001A&A...376..997L, Cat. J/A+A/376/997
Le Bertre et al., Paper II 2003A&A...403..943L 2003A&A...403..943L, Cat. J/A+A/403/943
(End) Marianne Brouty [CDS] 03-Mar-2006