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J/AJ/143/149  NIR spectroscopy of Galactic Wolf-Rayet stars. II.  (Shara+, 2012)

A near-infrared survey of the inner Galactic plane for Wolf-Rayet stars. II. Going fainter: 71 more new W-R stars. Shara M.M., Faherty J.K., Zurek D., Moffat A.F.J., Gerke J., Doyon R., Artigau E., Drissen L. <Astron. J., 143, 149 (2012)> =2012AJ....143..149S
ADC_Keywords: Stars, Wolf-Rayet ; Photometry, infrared ; Photometry, UBVRI ; Spectra, infrared ; Equivalent widths ; Spectral types Keywords: Galaxy: disk - Galaxy: stellar content - infrared: stars - stars: emission-line, Be - stars: Wolf-Rayet - surveys Abstract: We are continuing a J, K and narrowband imaging survey of 300°2 of the plane of the Galaxy, searching for new Wolf-Rayet (W-R) stars. Our survey spans 150° in Galactic longitude and reaches 1° above and below the Galactic plane. The survey has a useful limiting magnitude of K=15 over most of the observed Galactic plane, and K=14 (due to severe crowding) within a few degrees of the Galactic center. Thousands of emission-line candidates have been detected. In spectrographic follow-ups of 146 relatively bright W-R star candidates, we have re-examined 11 previously known WC and WN stars and discovered 71 new W-R stars, 17 of type WN and 54 of type WC. Our latest image analysis pipeline now picks out W-R stars with a 57% success rate. Star subtype assignments have been confirmed with the K-band spectra and distances approximated using the method of spectroscopic parallax. Some of the new W-R stars are among the most distant known in our Galaxy. The distribution of these new W-R stars is beginning to trace the locations of massive stars along the distant spiral arms of the Milky Way. Description: Near-IR spectra of candidate Wolf-Rayet stars were obtained with the SpeX spectrograph mounted on the 3m NASA Infrared Telescope Facility (IRTF) over 11 half-nights in 2009 August. We obtained an average resolving power of λ/Δλ∼1200. The near-infrared spectral data spanned 0.8-2.4µm. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 86 12 *Previously identified Wolf-Rayet stars table2.dat 86 71 New Wolf-Rayet stars table3.dat 81 12 Known Wolf-Rayet stars table4.dat 81 71 New Wolf-Rayet stars table5.dat 56 17 Equivalent width (Å) measurement for the most prominent lines of the new WN stars table6.dat 60 54 Equivalent width (Å) measurement for the most prominent lines of the new WC stars table7.dat 58 54 New WC stars organized by subtype table8.dat 58 17 New WN stars organized by subtype
Note on table1.dat: previously identified Wolf-Rayet stars from Shara et al. (Paper I, 2009AJ....138..402S ) that were observed using the SpeX spectrograph. A lack of BVR data implies that the star is below the 21st magnitude plate limits of the digitized sky surveys.
See also: VII/233 : The 2MASS Extended sources (IPAC/UMass, 2003-2006) I/297 : NOMAD Catalog (Zacharias+ 2005) III/215 : 7th Catalog of Galactic Wolf-Rayet stars (van der Hucht, 2001) III/143 : Spectrophotometry of Wolf-Rayet Stars (Torres-Dodgen+ 1988) J/ApJ/733/123 : The Wolf-Rayet content of M33 (NGC 598) (Neugent+, 2011) J/A+A/518/A29 : WR stars distribution in 2 nearby galaxies (Leloudas+, 2010) J/A+AS/108/669 : IUE spectra of WR stars (Niedzielski+, 1994) Byte-by-byte Description of file: table[12].dat
Bytes Format Units Label Explanations
1- 10 A10 --- Name Wolf-Rayet star name 12- 13 I2 h RAh Hour of Right Ascension (J2000) 15- 16 I2 min RAm Minute of Right Ascension (J2000) 18- 22 F5.2 s RAs Second of Right Ascension (J2000) 24 A1 --- DE- Sign of the Declination 25- 26 I2 deg DEd Degree of Declination (J2000) 28- 29 I2 arcmin DEm Arcminute of Declination (J2000) 31- 35 F5.2 arcsec DEs Arcsecond of Declination (J2000) 37- 42 F6.2 deg GLON Galactic longitude l 44- 48 F5.2 deg GLAT Galactic latitude b 50- 54 F5.2 mag Bmag [15.23/20.75]? NOMAD B band magnitude (from Cat. I/297) 56- 60 F5.2 mag Vmag [14.49/17.74]? NOMAD V band magnitude (from Cat I/297) 62- 66 F5.2 mag Rmag [13.31/20.02]? NOMAD R band magnitude (from Cat. I/297) 68- 73 F6.3 mag Jmag [8.61/18.08] 2MASS J magnitude 75- 80 F6.3 mag Hmag [7.99/15.06] 2MASS H magnitude 82- 86 F5.2 mag Ksmag [7.8/14.37] 2MASS Ks magnitude
Byte-by-byte Description of file: table[34].dat
Bytes Format Units Label Explanations
1- 10 A10 --- Name Wolf-Rayet star name 12- 13 A2 --- u_SpT [ :] Uncertainty flag on SpT (G1) 14- 35 A22 --- SpT Wolf-Rayet spectral subtype 37- 40 F4.2 mag AKs.J ? Interstellar Ks-band extinction estimated using the 2MASS J-Ks color and subtype values provided in Crowther et al. (2006MNRAS.372.1407C) 42- 45 F4.2 mag AKs.H ? Interstellar Ks-band extinction estimated using the 2MASS H-Ks color and subtype values provided in Crowther et al. (2006MNRAS.372.1407C) 47- 51 F5.2 mag AKs ? The average of the two values AKs.J and AKs.H 53- 57 F5.2 mag Ksmag 2MASS apparent Ks magnitude 59- 63 F5.2 mag KsMag ? The subtype-specific absolute magnitude derived for spectral subtypes by Crowther et al. (2006MNRAS.372.1407C) 65- 69 F5.2 mag DM ? Distance modulus 71- 75 F5.2 kpc d ? Heliocentric distance (with typical uncertainties of 25%) 77- 81 F5.2 kpc RG ? Galactocentric distance RG (with typical uncertainties of 25%)
Byte-by-byte Description of file: table5.dat
Bytes Format Units Label Explanations
1- 10 A10 --- Name Wolf-Rayet star name <[SFZ2012] FFFF-NNNAA> in Simbad 12 A1 --- f_SpT [:] Uncertainty flag on SpT (G1) 13- 34 A22 --- SpT Wolf-Rayet spectral subtype 36- 37 I2 0.1nm W(2.100) ? Equivalent width of NV 2.100µm emission line 39- 42 I4 0.1nm W(2.115) Equivalent width of HeI 2.115µm emission line 44- 46 I3 0.1nm W(2.165) Equivalent width of HeII+Brγ 2.165µm emission line 48- 51 I4 0.1nm W(2.189) ? Equivalent width of HeII 2.189µm emission line 53- 56 F4.1 --- Ratio ? ratio of equivalent widths W(2.189/2.165) used to categorize the WN stars
Byte-by-byte Description of file: table6.dat
Bytes Format Units Label Explanations
1- 10 A10 --- Name Wolf-Rayet star name <[SFZ2012] FFFF-NNNAA> in Simbad 12 A1 --- f_SpT [:] Uncertainty flag on SpT (G1) 13- 34 A22 --- SpT Wolf-Rayet spectral subtype 36- 39 I4 0.1nm W(2.076) ? Equivalent width of CIV 2.076µm emission line 40 A1 --- f_W(2.076) [a] Flag on W(2.076) (1) 42- 45 I4 0.1nm W(2.110) ? Equivalent width of HeI+CIII 2.110µm emission line 46 A1 --- f_W(2.110) [b] Flag on W(2.110) (1) 48- 50 I3 0.1nm W(2.165) ? Equivalent width of HeI 2.165µm emission line 51 A1 --- f_W(2.165) [c] Flag on W(2.165) (1) 53- 55 I3 0.1nm W(2.189) ? Equivalent width of HeII 2.189µm emission line 56 A1 --- f_W(2.189) [d] Flag on W(2.189) (1) 58- 60 F3.1 --- Ratio ? ratio of equivalent widths W(2.076/2.110) used to categorize the WC stars
Note (1): The Table 6 provides a second value for the equivalent widths of the Wolf-Rayet star 1669-24L. This second equivalent width is: a = W(2.076)=-423Å; b = W(2.110)=-47Å; c = W(2.165)=-25Å; d = W(2.189)=-56Å.
Byte-by-byte Description of file: table[78].dat
Bytes Format Units Label Explanations
1- 10 A10 --- Name Wolf-Rayet star name <[SFZ2012] FFFF-NNNAA> in Simbad 12 A1 --- f_SpT [:] Uncertainty flag on SpT (G1) 13- 34 A22 --- SpT Wolf-Rayet spectral subtype 36- 40 F5.2 mag Dm(HeI) ? Difference from the interpolated continum magnitude for the HeI narrowband filter (2) 42- 46 F5.2 mag Dm(CIV) ? Difference from the interpolated continum magnitude for the CIV narrowband filter (2) 48- 52 F5.2 mag Dm(Brg) ? Difference from the interpolated continum magnitude for the Brγ narrowband filter (2) 54- 58 F5.2 mag Dm(HeII) ? Difference from the interpolated continum magnitude for the HeII narrowband filter (2)
Note (2): Negative value indicate emission, positive values indicate absorption for lines in the narrowband emission-line filter.
Global notes: Note (G1): : = indicates an uncertainty of up to ±2 subtypes (differences among stars of type WC4-8 are difficult to distinguish from one another).
History: From electronic version of the journal References: Shara et al. Paper I. 2009AJ....138..402S
(End) Sylvain Guehenneux [CDS] 22-Jul-2013
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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