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J/A+A/496/841       VLT-FLAMES survey of massive stars       (Hunter+, 2009)

The VLT-FLAMES survey of massive stars: constraints on stellar evolution from the chemical compositions of rapidly rotating Galactic and Magellanic Cloud B-type stars. Hunter I., Brott I., Langer N., Lennon D.J., Dufton P.L., Howarth I.D., Ryans R.S.I., Trundle C., Evans C.J., De Koter A., Smartt S.J. <Astron. Astrophys., 496, 841-853 (2009)> =2009A&A...496..841H
ADC_Keywords: Clusters, open ; Stars, early-type ; Abundances Keywords: stars: early-type - stars: atmospheres - stars: rotation - stars: abundances - stars: evolution - galaxies: Magellanic Clouds Abstract: We have previously analysed the spectra of 135 early B-type stars in the Large Magellanic Cloud (LMC) and found several groups of stars that have chemical compositions that conflict with the theory of rotational mixing. Here we extend this study to Galactic and Small Magellanic Cloud (SMC) metallicities. We provide chemical compositions for ∼50 Galactic and ∼100 SMC early B-type stars and compare these to the LMC results. These samples cover a range of projected rotational velocities up to ∼300km/s and hence are well suited to testing rotational mixing models. The surface nitrogen abundances are utilised as a probe of the mixing process since nitrogen is synthesized in the core of the stars and mixed to the surface. Description: The majority of the data were obtained using the Fibre Large Array Multi-Element Spectrograph (FLAMES) on the 8.2m European Southern Observatory Very Large Telescope (ESO-VLT) at Paranal, Chile. These data were supplemented by UVES and FEROS observations of the brighter targets. Approximately 300 Galactic objects were observed and these are associated with the clusters NGC 6611, NGC 3293 and NGC 4755. The observations have been described in detail in Paper I (Evans et al., 2005, Cat. J/A+A/437/467) and Paper II (Evans et al., 2006, Cat. J/A+A/456/623). File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 40 15158 Equivalent width measurements and derived abundances for the metal lines observed in the spectra of our sample stars table2.dat 92 291 Atmospheric parameters, projected rotational velocities and chemical compositions of the sample
See also: J/A+A/437/467 : VLT-FLAMES survey of massive stars (Evans+, 2005) J/A+A/456/623 : VLT-FLAMES survey of massive stars (Evans+, 2006) J/A+A/457/265 : VLT-FLAMES survey of massive stars (Dufton+, 2006) J/A+A/466/277 : VLT-FLAMES survey of massive stars (Hunter+, 2007) J/A+A/471/625 : VLT-FLAMES survey of massive stars (Trundle+, 2007) J/A+A/479/541 : VLT-FLAMES survey of massive stars (Hunter+, 2008) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 12 A12 --- Name Source name 15- 20 A6 --- El Element 22- 28 F7.2 0.1nm lambda Wavelength 30 A1 --- l_EW Limit flag on EW 31- 33 I3 0.1nm EW ?=- Equivalent width 36 A1 --- l_N Limit flag on N 37- 40 F4.2 ---- N ?=- Abundance
Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 12 A12 --- Name Source name (1) 14- 18 I5 K Teff Effective temperature (2) 20- 23 F4.2 [cm/s2] logg Surface gravity (2) 25- 26 I2 km/s vt ?=- Microturbulent velocity (2) 28- 30 I3 km/s vsini Projected rotational velocity (2) 32- 35 F4.2 --- C ?=- Carbon abundance (log(H)=12) (3) 37- 40 F4.2 --- e_C ? rms uncertainty on C 42 I1 --- o_C ? Number of lines observed for C abundance 44 A1 --- l_N Limit flag on N abundance 45- 48 F4.2 --- N ?=- Nitrogen abundance (log(H)=12) (3) 50- 53 F4.2 --- e_N ? rms uncertainty on N 55 I1 --- o_N ? Number of lines observed for N abundance 57- 60 F4.2 --- O ?=- Oxygen abundance (log(H)=12) (3) 62- 65 F4.2 --- e_O ? rms uncertainty on O 67- 68 I2 --- o_O ? Number of lines observed for O abundance 70- 73 F4.2 --- Mg ?=- Magnesium abundance (log(H)=12) (3) 75- 78 F4.2 --- e_Mg ? rms uncertainty on Mg 80 I1 --- o_Mg ? Number of lines observed for Mg abundance 82- 85 F4.2 --- Si ?=- Silicon abundance (log(H)=12) (3) 87- 90 F4.2 --- e_Si ? rms uncertainty on Si 92 I1 --- o_Si ? Number of lines observed for Si abundance
Note (1): Alternative stellar identifiers can be found in Papers I (Cat. J/A+A/437/467) and II (Cat. J/A+A/456/623). Note (2): The atmospheric parameters and rotational velocities are taken from Papers III (Cat. J/A+A/457/265) and IV (Cat. J/A+A/466/277). Note (3): Abundances are presented on the scale 12+log[X/H]. A correction has been applied to the carbon abundances.
History: From electronic version of the journal References: Evans et al., Paper I 2005A&A...437..467E, Cat. J/A+A/437/467 Evans et al., Paper II 2006A&A...456..623E, Cat. J/A+A/456/623 Dufton et al., Paper III 2006A&A...457..265D, Cat. J/A+A/457/265 Hunter et al., Paper IV 2007A&A...466..277H, Cat. J/A+A/466/277 Trundel et al., Paper V 2007A&A...471..625T, Cat. J/A+A/471/625 Hunter et al., Paper VI 2008A&A...479..541H, Cat. J/A+A/479/541
(End) Patricia Vannier [CDS] 26-Apr-2009
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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