J/A+A/446/773 GLMP sample of galactic OH/IR stars (Jimenez-Esteban+, 2006)
An infrared study of galactic OH/IR stars.
II. The "GLMP sample" of red oxygen-rich AGB stars
Jimenez-Esteban F.M., Garcia-Lario P., Engels D., Perea Calderon J.V.
<Astron. Astrophys. 446, 773 (2006)>
=2006A&A...446..773J 2006A&A...446..773J
ADC_Keywords: Infrared sources ; Stars, variable ; Photometry, infrared
Keywords: stars: AGB and post-AGB
Abstract:
We present optical and near-infrared finding charts taken from the DSS
and 2MASS surveys of 94 IRAS sources selected from the GLMP catalogue,
and accurate astrometry (∼0.2") for most of them. Selection criteria
were very red IRAS colours representative for OH/IR stars with
optically thick circumstellar shells and the presence of variability
according to the IRAS variability index (VAR>50). The main photometric
properties of the stars in this `GLMP sample' are presented, discussed
and compared with the correspondent properties of the `Arecibo sample'
of OH/IR stars studied nearlier. We find that 37% of the sample (N=34)
has no counterpart in the 2MASS, implying extremely high optical
depths of their shells. Most of the sources identified in the 2MASS
are faint (K≳8) and are of very red colour in the near-infrared, as
expected. The brightest 2MASS counterpart (K=5.3mag) was found for
IRAS18299-1705. Its blue colour H-K=1.3 suggests that IRAS18299-1705
is a post-AGB star. Few GLMP sources have faint but relatively blue
counterparts. They might be misidentified field stars or stars that
recently experienced a drop of their mass loss rates. The `GLMP
sample' in general is made of oxygen-rich AGB stars, which are highly
obscured by their circumstellar shells. They belong to the same
population as the reddest OH/IR stars in the `Arecibo sample'.
Description:
Table3 contains the 2MASS coordinates. It also contains the relative
distance from the near infrared counterpart found to the original IRAS
coordinates. When available, the distance of the associated MSX
counterparts to the IRAS position is also provided for comparison.
Table4 contains the MSX coordinates. It also contains the relative
distance from the MSX counterpart found to the original IRAS
coordinates.
Table5 contains the near infrared magnitudes (or lower magnitude
limits) for the GLMP sources (Garcia-Lario et al., see Cat.
J/A+AS/126/479)
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table3.dat 99 59 Astrometric information for the sources for
which a near infrared counterpart was found.
table4.dat 80 35 Astrometric information for the sources for
which a near infrared counterpart was not found
table5.dat 82 59 Near infrared photometry of the GLMP sources for
which a near infrared counterpart was found
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See also:
II/125 : IRAS catalogue of Point Sources, Version 2.0 (IPAC 1986)
II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
V/114 : MSX6C Infrared Point Source Catalog (Egan+ 2003)
J/A+AS/126/479 : NIR photometry of IRAS sources. III (Garcia-Lario+, 1997)
Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- GLMP GLMP number (Cat. J/A+AS/126/479)
8- 17 A10 --- IRAS IRAS name
19 A1 --- 2M [*] Tentative 2MASS identification
24- 25 I2 h RAh 2MASS right ascension (J2000)
27- 28 I2 min RAm 2MASS right ascension (J2000)
30- 34 F5.2 s RAs 2MASS right ascension (J2000)
37 A1 --- DE- 2MASS declination sign (J2000)
38- 39 I2 deg DEd 2MASS declination (J2000)
41- 42 I2 arcmin DEm 2MASS declination (J2000)
44- 47 F4.1 arcsec DEs 2MASS declination (J2000)
52- 54 I3 arcsec oRA.2M Relative distance between 2MASS and IRAS (RA)
58- 60 I3 arcsec oDE.2M Relative distance between 2MASS and IRAS (Dec)
64- 66 I3 arcsec oRA.MSX ? Relative distance between MSX and IRAS (RA)
70- 72 I3 arcsec oDE.MSX ? Relative distance between MSX and IRAS (Dec)
78- 93 A16 --- MSX6CG MSX name (MSX6C GLLL.llll+BB.bbbb)
97- 98 A2 --- Opt [**] Shows optical counterpart
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- GLMP GLMP number
8- 17 A10 --- IRAS IRAS name
19 A1 --- f_IRAS [*] IRAS coordinates
24- 25 I2 h RAh MSX right ascension (J2000)
27- 28 I2 min RAm MSX right ascension (J2000)
30- 33 F4.1 s RAs MSX right ascension (J2000)
37 A1 --- DE- MSX declination sign (J2000)
38- 39 I2 deg DEd MSX declination (J2000)
41- 42 I2 arcmin DEm MSX declination (J2000)
44- 45 I2 arcsec DEs MSX declination (J2000)
52- 54 I3 arcsec oRA.MSX ? Relative distance between MSX and IRAS (RA)
58- 60 I3 arcsec oDE.MSX ? Relative distance between MSX and IRAS (Dec)
64- 79 A16 --- MSX6CG MSX name (MSX6C GLLL.llll+BB.bbbb)
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Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
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1- 10 A10 --- IRAS IRAS name
14 A1 --- n_Jmag [* ] Accuracy of the J photometry is affected
by blending according to 2MASS catalogue
17- 18 A2 --- f_Jmag [* ] J photometry obtained from the 2MASS images
22 A1 --- l_Jmag Upper or lower limit indicator
23- 27 F5.2 mag Jmag J magnitude
31- 34 F4.2 mag e_Jmag ? J magnitude uncertainty
38 A1 --- n_Hmag [* ] Accuracy of the H photometry is affected
by blending according to 2MASS catalogue
41- 42 A2 --- f_Hmag [* ] H photometry obtained from the 2MASS images
46 A1 --- l_Hmag Upper or lower limit indicator
47- 51 F5.2 mag Hmag H magnitude
55- 58 F4.2 mag e_Hmag ? H magnitude uncertainty
62 A1 --- n_Kmag [* ] Accuracy of the K photometry is affected
by blending according to 2MASS catalogue
65- 66 A2 --- f_Kmag [* ] K photometry obtained from 2MASS images
70 A1 --- l_Kmag Upper or lower limit indicator
71- 75 F5.2 mag Kmag K magnitude
79- 82 F4.2 mag e_Kmag ? K magnitude uncertainty
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Acknowledgements:
Francisco Manuel Jimenez-Esteban, steb313(at)hs.uni-hamburg.de
(End) Patricia Vannier [CDS] 25-Nov-2005