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J/A+A/387/129       IR observations of S stars                     (Wang+, 2002)

Near-infrared observations of candidate extrinsic S stars. Wang X.-H., Chen P.-S. <Astron. Astrophys. 387, 129 (2002)> =2002A&A...387..129W
ADC_Keywords: Stars, late-type ; Stars, S ; Infrared sources ; Photometry, infrared Keywords: stars: AGB and post-AGB - stars: evolution - stars: circumstellar matter - infrared: stars Abstract: Photometric observations in the near infrared for 161 S stars, including 18 Tc-rich (intrinsic) stars, 19 Tc-deficient (extrinsic) ones and 124 candidates for Tc-deficient S stars, are presented in this paper. Based on some further investigations into the infrared properties of both Tc-rich and Tc-deficient S stars, 104 candidates are identified as very likely Tc-deficient S stars. The large number of infrared-selected Tc-deficient S stars provides a convenient way to study the physical properties and the evolutionary status of this species of S stars. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 34 81 α12 values of the S stars whose Tc contents are well known. table2.dat 101 40 Observed S stars whose Tc contents have been well known. table3.dat 101 131 Observed candidates for Tc-deficient S stars
See also: III/168 : General Catalog of S Stars, second edition (Stephenson 1984) III/197 : IRAS Low Resolution Spectra (IRAS team, 1987) J/AZh/76/604 : Spectrophotometry of S and carbon stars (Tereshchenko, 1999) J/A+A/333/952 : BVRI photometry of HR 1105 (Adelman 1998) J/A+AS/113/51 : Catalogue of associations IRAS and S stars (Chen+, 1995) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1 A1 --- TcType [ab] a: Tc-deficient S stars (extrinsic) b: Tc-rich S stars (intrinsic) 3- 11 A9 --- Name Star name (G1) 13- 22 A10 --- IRAS IRAS designation 23 A1 --- Note [a] a: In a region of the sky not surveyed by IRAS 24- 27 F4.2 --- alpha12 ? Spectral slope between the 12 and 25µm (1) 29- 33 A5 --- LRS LRS classification
Note (1): Spectral slope between the 12 and 25µm: alpha12 = log(25F12/12F25)/log(25/12), where F12 and F25 are fluxes in Jy at 12 and 25µm respectively.
Byte-by-byte Description of file: table2.dat table3.dat
Bytes Format Units Label Explanations
1 A1 --- TcType [abc] a: Tc-deficient S star b: Tc-rich S star c: candidates for Tc-deficient S star 3- 11 A9 --- Name Star name (G1) 13- 22 A10 --- IRAS IRAS designation 23 A1 --- Note [a] a: In a region of the sky not surveyed by IRAS. 25- 34 A10 "YYYY/MM/DD" Date Observation date 36- 39 F4.1 mag Vmag ? V or B magnitude 40 A1 --- n_Vmag [BIv] B: B magnitude in Vmag I: I magnitude in Vmag v: variable 42- 46 F5.2 mag Jmag J magnitude 48- 52 F5.2 mag Hmag H magnitude 54- 58 F5.2 mag Kmag K magnitude 60- 66 F7.3 Jy F12um ? Flux at 12µ 68- 74 F7.3 Jy F25um ? Flux at 25µ 76- 81 F6.3 Jy F60um ? Flux at 60µ 83- 88 F6.3 Jy F100um ? Flux at 100µ 90- 94 A5 --- LRS LRS classification 96- 98 A3 --- f_CIO JHK flags (1) 100-101 A2 --- Tc [n:? ] Tc deficient status for candidates (2)
Note (1): Catalog of Infrared Observations (Gezari et al., 1993, see Cat. II/225) set of symbols for J, H and K band respectively. *: there is no observation appearing in CIO catalog v: there is a difference of more than 0.2 between the present measurement and one of the previous data in CIO JHK: the CIO magnitudes at the corresponding band do not differ by more than 0.2 from the value here Note (2): Judgement on a star as a Tc-deficient S star: n - the star should be Tc-deficient as judged by the (K-[12])-([12]-[25]) diagram n: - states that judgement for Tc-deficiency is made only by the K-[12] histogram due to the lack of the flux at 25µm n? - star that has the proper K-[12] color as a Tc-deficient S star but does not lie in the area populated by Tc-deficient stars in the (K-[12])-([12]-[25]) plot and should not taken as a good candidate of Tc-deficient S stars.
Global notes: Note (G1): Names: SNNNN: CSS NNNN in Simbad, Stephenson, 1984, Cat. III/168 SfNN : CSS2 NN in Simbad, Stephenson, 1990AJ....100..569S
History: Prepared via OCR at CDS. * 02-Dec-2002: Tables 1 and 2, name of star IRAS 19323+4909 corrected to V1743 Cyg (instead of V1743 Peg) References: Chen et al., Paper I 1998A&A...333..613C
(End) James Marcout, Patricia Bauer [CDS] 30-May-2002
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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