J/A+AS/122/489 New infrared carbon stars in IRAS PSC (Guglielmo+ 1997)
New infrared carbon stars in the IRAS Point Source Catalog
Guglielmo F., Epchtein N., Arditti F., Sevre F.
<Astron. Astrophys. Suppl. Ser. 122, 489 (1997)>
=1997A&AS..122..489G 1997A&AS..122..489G
ADC_Keywords: Stars, carbon ; Photometry, infrared
Keywords: stars: carbon - stars: circumstellar matter - stars: late-type -
stars: AGB and post-AGB - Galaxy: stellar content - infrared: stars
Abstract:
We present new results of a search for infrared carbon stars (IRCS)
based on the combination of IRAS and near infrared colours. A sample
of 207 stars with IRAS colours that characterize IRCS is selected and
measured in the JHKL photometric bands. Using a [12-25] vs. K-L colour
diagram, 20 new IRCS candidates are proposed. Medium resolution
spectra in the ∼6000-9000Å range of 8 of these candidates confirm
their carbon rich nature. In addition we propose a few stars with LRS
class "4n" as oxygen-rich candidates, and a few stars with LRS classes
"0n" and "1n" as carbon-rich.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 60 218 New infrared photometric data
table2.tex 82 407 LaTeX version of table2
table3.dat 78 155 List of reference catalogs used
table3.tex 88 242 LaTeX version of table3
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See also:
II/125 : IRAS catalogue of Point Sources, Version 2.0 (IPAC 1986)
III/197 : IRAS Low Resolution Spectra (IRAS team, 1987)
III/156 : Cool Galactic Carbon Stars, 2nd Edition (Stephenson 1989)
III/168 : General Catalog of S Stars, second edition (Stephenson 1984)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 10 A10 --- IRAS IRAS II/125 name
11 A1 --- f_IRAS [*] * indicates possible contamination of the
near IR fluxes by a nearby star
13 I1 --- OBS Code for the epoch of the observation (1)
15- 18 F4.2 mag Kmag K magnitude
20- 23 F4.2 mag J-K ? J-K color index
25- 28 F4.2 mag H-K ? H-K color index
30- 33 F4.2 mag K-L ? K-L color index
35- 38 F4.2 mag [12-25] ? IRAS [12-25] color index (2)
40- 44 F5.2 mag [25-60] ? IRAS [25-60] color index (2)
46- 47 I2 --- LRS ? IRAS Low-Resolution Spectral type
(Cat. III/197)
49- 50 A2 --- Class Classification in our system (4)
52- 55 A4 --- VH Classification in van der Veen and Habing system
(1988A&A...194..125V 1988A&A...194..125V) (5)
57- 59 A3 --- Id [CSGIM? ] Identification in other catalogues (3)
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Note (1): the code indicates the following observing periods:
1 = epoch 27-01-1992 to 04-02-1992
2 = epoch 02-08-1992 to 17-08-1992
3 = epoch 19-11-1992 to 01-12-1992
4 = epoch 14-02-1993 to 26-02-1993
Note (2): The IRAS colours are defined using the magnitude scale given
in the IRAS Explanatory Supplement (IRAS Science Team, 1987)
Note (3): The flags indicate that the objects have an entry in one or
several of the following catalogs:
C = GCCCS General Catalog of Cool Carbon Stars III/156
S = General Catalog of S Stars III/168
G = GSC Guide Star Catalog I/220
I = another stellar catalog quoted in the IRAS PSC
M = detected in one or several radio lines
CO/HCN (Loup et al., 1993A&AS...99..291L 1993A&AS...99..291L)
H2O maser (Comoretto et al., 1990A&AS...84..179C 1990A&AS...84..179C)
OH maser (te Lintel-Hekkert et al., 1989A&AS...78..399T 1989A&AS...78..399T)
More detailed information is given in Table 3.
Note (4): basic classes from Epchtein et al. (1987A&AS...71...39E 1987A&AS...71...39E) as follows:
a = blackbody spectrum > 4000K, IR emission from photospheric origin
b = late M-type stars, eventually surrounded by a weak dust shell
c = likely C-type stars (carbon stars)
o = likely O-rich stars; increasing dust shell (decreasing temperature)
from o1 to o3
Note (5): classification from the IRAS color indexes, summarized as follows:
I = O-rich stars without dust shell
II = Variable star with "young" O-rich dust shell
IIIa = Variable star with evolved O-rich dust shell
IIIb = Variable star with thick O-rich dust shell
IV = Variable star with very thick O-rich dust shell
V = Planetary nebula or non-variable star with very cool dust shell
VIa = Non-variable star with cold dust shell at large distance
VIb = Variable star with close hot dust shell + cold distant dust shell
VII = Variable star with evolved C-rich dust shell
VIII = Other sorts of objects
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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- 10 A10 --- IRAS IRAS II/125 name
12- 19 A8 --- GCVS GCVS designation II/139
21- 26 I6 --- TMSS ? TMSS designation II/2
28- 31 I4 --- RAFGL ? RAFGL designation II/94
32 A1 --- m_RAFGL Multiplicity index on RAFGL name
34- 37 I4 --- GCCCS ? GCCCS designation III/156
38 A1 --- n_GCCCS [S] S indicates that GCCCS contains designation
from General Catalog of S Stars III/168
40- 48 A9 --- GSC GSC designation (Cat. I/220)
49- 52 A4 --- GSC2 Second GSC designation
54- 78 A25 --- Others Other names (1)
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Note (1): the catalogues are:
DO = Dearborn Observatory Catalogue of Faint Red Stars II/68
SAO = Smithsonian Astrophysical Observatory Star Catalog I/131
NSV = New Catalogue of Suspected Variable Stars II/140
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Acknowledgements: Francois Guglielmo
References:
Comoretto et al., 1990 A&AS 84, 179 =1990A&AS...84..179C 1990A&AS...84..179C
Dearborn Observatory Catalogue of Faint Red Stars (DO) =Cat. II/68
Epchtein et al., 1987 A&AS 71, 39 =1987A&AS...71...39E 1987A&AS...71...39E
General Catalog of Cool Carbon Stars (GCCCS) =Cat. III/156
General Catalog of S Stars (GCS) =Cat. III/168
General catalog of Variable Stars (GCVS) =Cat. II/139
Loup et al., 1993 A&AS 99, 291 =1993A&AS...99..291L 1993A&AS...99..291L
New Catalogue of Suspected Variable Stars (NSV) =Cat. II/140
Revised Air Force Geophysical Laboratory (RAFGL) =Cat. II/94
Smithsonian Astrophysical Observatory Star Catalog (SAO) =Cat. I/131
Southern Galaxy Catalogue (GSC) =Cat. VII/116
Two Micron Sky Survey (TMSS) =Cat. II/2
te Lintel-Hekkert et al., 1989 A&AS 78, 399 =1989A&AS...78..399T 1989A&AS...78..399T
van der Veen and Habing, 1988 A&A 194, 125 =1988A&A...194..125V 1988A&A...194..125V
(End) Patricia Bauer [CDS] 29-Aug-1996